23431113240 has 64 divisors (see below), whose sum is σ = 70799097600. Its totient is φ = 6203340672.

The previous prime is 23431113239. The next prime is 23431113241. The reversal of 23431113240 is 4231113432.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23431113239) and next prime (23431113241).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23431113240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431113241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685692 + ... + 719051.

It is an arithmetic number, because the mean of its divisors is an integer number (1106235900).

Almost surely, 2^23431113240 is an apocalyptic number.

23431113240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23431113240 is an abundant number, since it is smaller than the sum of its proper divisors (47367984360).

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

23431113240 is a wasteful number, since it uses less digits than its factorization.

23431113240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404896 (or 1404892 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 23431113240 its reverse (4231113432), we get a palindrome (27662226672).

The spelling of 23431113240 in words is "twenty-three billion, four hundred thirty-one million, one hundred thirteen thousand, two hundred forty".