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23012232020 = 2251544374507
BaseRepresentation
bin10101011011101000…
…101100101101010100
32012101202120111202122
4111123220230231110
5334112112411040
614323251555112
71443156513311
oct253350545524
965352514678
1023012232020
119839894578
1245628bba98
13222978294b
141184393d08
158ea4291b5
hex55ba2cb54

23012232020 has 24 divisors (see below), whose sum is σ = 48329465184. Its totient is φ = 9204173216.

The previous prime is 23012232011. The next prime is 23012232031. The reversal of 23012232020 is 2023221032.

It is a self number, because there is not a number n which added to its sum of digits gives 23012232020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271607 + ... + 346113.

It is an arithmetic number, because the mean of its divisors is an integer number (2013727716).

Almost surely, 223012232020 is an apocalyptic number.

23012232020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012232020 is an abundant number, since it is smaller than the sum of its proper divisors (25317233164).

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

23012232020 is a wasteful number, since it uses less digits than its factorization.

23012232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89959 (or 89957 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 23012232020 its reverse (2023221032), we get a palindrome (25035453052).

The spelling of 23012232020 in words is "twenty-three billion, twelve million, two hundred thirty-two thousand, twenty".

Divisors: 1 2 4 5 10 20 15443 30886 61772 74507 77215 149014 154430 298028 308860 372535 745070 1490140 1150611601 2301223202 4602446404 5753058005 11506116010 23012232020