23130534520 has 16 divisors (see below), whose sum is σ = 52043702760. Its totient is φ = 9252213792.

The previous prime is 23130534503. The next prime is 23130534521. The reversal of 23130534520 is 2543503132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23130534521) 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, 289131642 + ... + 289131721.

Almost surely, 2^23130534520 is an apocalyptic number.

23130534520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23130534520 is an abundant number, since it is smaller than the sum of its proper divisors (28913168240).

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

23130534520 is a wasteful number, since it uses less digits than its factorization.

23130534520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578263374 (or 578263370 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 23130534520 in words is "twenty-three billion, one hundred thirty million, five hundred thirty-four thousand, five hundred twenty".