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20123233120 = 255125770207
BaseRepresentation
bin10010101111011100…
…000010101101100000
31220221102102011022101
4102233130002231200
5312203021424440
613124450420144
71311446442064
oct225734025540
956842364271
1020123233120
118597049981
123a97291654
131b89094343
14d8c803aa4
157cb9ae69a
hex4af702b60

20123233120 has 24 divisors (see below), whose sum is σ = 47541138624. Its totient is φ = 8049293184.

The previous prime is 20123233111. The next prime is 20123233129. The reversal of 20123233120 is 2133232102.

It is an interprime number because it is at equal distance from previous prime (20123233111) and next prime (20123233129).

It is a super-5 number, since 5×201232331205 (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123233129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62884944 + ... + 62885263.

It is an arithmetic number, because the mean of its divisors is an integer number (1980880776).

Almost surely, 220123233120 is an apocalyptic number.

20123233120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123233120 is an abundant number, since it is smaller than the sum of its proper divisors (27417905504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123233120 is a wasteful number, since it uses less digits than its factorization.

20123233120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125770222 (or 125770214 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20123233120 its reverse (2133232102), we get a palindrome (22256465222).

The spelling of 20123233120 in words is "twenty billion, one hundred twenty-three million, two hundred thirty-three thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 125770207 251540414 503080828 628851035 1006161656 1257702070 2012323312 2515404140 4024646624 5030808280 10061616560 20123233120