23431320402040 has 16 divisors (see below), whose sum is σ = 52720470904680. Its totient is φ = 9372528160800.

The previous prime is 23431320401977. The next prime is 23431320402109. The reversal of 23431320402040 is 4020402313432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292891504986 + ... + 292891505065.

Almost surely, 2^{23431320402040} is an apocalyptic number.

23431320402040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23431320402040 is an abundant number, since it is smaller than the sum of its proper divisors (29289150502640).

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

23431320402040 is a wasteful number, since it uses less digits than its factorization.

23431320402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585783010062 (or 585783010058 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 23431320402040 its reverse (4020402313432), we get a palindrome (27451722715472).

The spelling of 23431320402040 in words is "twenty-three trillion, four hundred thirty-one billion, three hundred twenty million, four hundred two thousand, forty".