23431315720 has 16 divisors (see below), whose sum is σ = 52720460460. Its totient is φ = 9372526272.

The previous prime is 23431315709. The next prime is 23431315729. The reversal of 23431315720 is 2751313432.

It can be written as a sum of positive squares in 2 ways, for example, as 23397373444 + 33942276 = 152962^2 + 5826^2 .

It is not an unprimeable number, because it can be changed into a prime (23431315729) 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, 292891407 + ... + 292891486.

Almost surely, 2^23431315720 is an apocalyptic number.

23431315720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23431315720 is an abundant number, since it is smaller than the sum of its proper divisors (29289144740).

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

23431315720 is a wasteful number, since it uses less digits than its factorization.

23431315720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585782904 (or 585782900 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The spelling of 23431315720 in words is "twenty-three billion, four hundred thirty-one million, three hundred fifteen thousand, seven hundred twenty".