23131331004 has 48 divisors (see below), whose sum is σ = 54738253472. Its totient is φ = 7601236992.

The previous prime is 23131330973. The next prime is 23131331011. The reversal of 23131331004 is 40013313132.

It is a super-2 number, since 2×23131331004² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371722 + ... + 2381454.

Almost surely, 2^23131331004 is an apocalyptic number.

It is an amenable number.

23131331004 is an abundant number, since it is smaller than the sum of its proper divisors (31606922468).

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

23131331004 is a wasteful number, since it uses less digits than its factorization.

23131331004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12526 (or 12524 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23131331004 its reverse (40013313132), we get a palindrome (63144644136).

The spelling of 23131331004 in words is "twenty-three billion, one hundred thirty-one million, three hundred thirty-one thousand, four".