23151935520 has 432 divisors, whose sum is σ = 97316128728. Its totient is φ = 4980326400.

The previous prime is 23151935509. The next prime is 23151935551. The reversal of 23151935520 is 2553915132.

23151935520 is a `hidden beast` number, since 2 + 3 + 15 + 1 + 93 + 552 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21338197776 + 1813737744 = 146076^2 + 42588^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1189870 + ... + 1209170.

Almost surely, 2^23151935520 is an apocalyptic number.

23151935520 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 23151935520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48658064364).

23151935520 is an abundant number, since it is smaller than the sum of its proper divisors (74164193208).

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

23151935520 is a wasteful number, since it uses less digits than its factorization.

23151935520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19353 (or 19335 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 23151935520 in words is "twenty-three billion, one hundred fifty-one million, nine hundred thirty-five thousand, five hundred twenty".