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20320033020 = 223571712722409
BaseRepresentation
bin10010111011001010…
…110001100011111100
31221110010201122000120
4102323022301203330
5313103412024040
613200200454540
71316356300530
oct227312614374
957403648016
1020320033020
118688146621
123b3117a450
131bbaa9aba1
14daa9d1bc0
157dddd57d0
hex4bb2b18fc

20320033020 has 192 divisors, whose sum is σ = 69394268160. Its totient is φ = 4336754688.

The previous prime is 20320032959. The next prime is 20320033021. The reversal of 20320033020 is 2033002302.

It is a Harshad number since it is a multiple of its sum of digits (15).

20320033020 is a modest number, since divided by 33020 gives 20320 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320033021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 895576 + ... + 917984.

It is an arithmetic number, because the mean of its divisors is an integer number (361428480).

Almost surely, 220320033020 is an apocalyptic number.

20320033020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20320033020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34697134080).

20320033020 is an abundant number, since it is smaller than the sum of its proper divisors (49074235140).

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

20320033020 is a wasteful number, since it uses less digits than its factorization.

20320033020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22572 (or 22570 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

Adding to 20320033020 its reverse (2033002302), we get a palindrome (22353035322).

The spelling of 20320033020 in words is "twenty billion, three hundred twenty million, thirty-three thousand, twenty".