23733520520 has 16 divisors (see below), whose sum is σ = 53400421260. Its totient is φ = 9493408192.

The previous prime is 23733520513. The next prime is 23733520523. The reversal of 23733520520 is 2502533732.

It can be written as a sum of positive squares in 2 ways, for example, as 21209261956 + 2524258564 = 145634^2 + 50242^2 .

It is a super-2 number, since 2×23733520520² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23733520523) 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, 296668967 + ... + 296669046.

Almost surely, 2^23733520520 is an apocalyptic number.

23733520520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23733520520 is an abundant number, since it is smaller than the sum of its proper divisors (29666900740).

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

23733520520 is a wasteful number, since it uses less digits than its factorization.

23733520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593338024 (or 593338020 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 32.

The spelling of 23733520520 in words is "twenty-three billion, seven hundred thirty-three million, five hundred twenty thousand, five hundred twenty".