23012520031 has 4 divisors (see below), whose sum is σ = 23145540552. Its totient is φ = 22879499512.

The previous prime is 23012520019. The next prime is 23012520053. The reversal of 23012520031 is 13002521032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23012520031 is a prime.

It is a super-2 number, since 2×23012520031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23012519990 and 23012520008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012520331) 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, 66510001 + ... + 66510346.

It is an arithmetic number, because the mean of its divisors is an integer number (5786385138).

Almost surely, 2^23012520031 is an apocalyptic number.

23012520031 is a deficient number, since it is larger than the sum of its proper divisors (133020521).

23012520031 is a wasteful number, since it uses less digits than its factorization.

23012520031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133020520.

The product of its (nonzero) digits is 360, while the sum is 19.

The spelling of 23012520031 in words is "twenty-three billion, twelve million, five hundred twenty thousand, thirty-one".