23134521520 has 40 divisors (see below), whose sum is σ = 58677561360. Its totient is φ = 8412552960.

The previous prime is 23134521481. The next prime is 23134521533. The reversal of 23134521520 is 2512543132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×23134521520² (a number of 22 digits) contains 22 as substring.

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, 13143735 + ... + 13145494.

It is an arithmetic number, because the mean of its divisors is an integer number (1466939034).

Almost surely, 2^23134521520 is an apocalyptic number.

23134521520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23134521520 is an abundant number, since it is smaller than the sum of its proper divisors (35543039840).

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

23134521520 is a wasteful number, since it uses less digits than its factorization.

23134521520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26289253 (or 26289247 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 23134521520 in words is "twenty-three billion, one hundred thirty-four million, five hundred twenty-one thousand, five hundred twenty".