23431121320 has 16 divisors (see below), whose sum is σ = 52720023060. Its totient is φ = 9372448512.

The previous prime is 23431121317. The next prime is 23431121341. The reversal of 23431121320 is 2312113432.

It can be written as a sum of positive squares in 2 ways, for example, as 20169112324 + 3262008996 = 142018^2 + 57114^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23431121291 and 23431121300.

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, 292888977 + ... + 292889056.

Almost surely, 2^23431121320 is an apocalyptic number.

23431121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23431121320 is an abundant number, since it is smaller than the sum of its proper divisors (29288901740).

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

23431121320 is a wasteful number, since it uses less digits than its factorization.

23431121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585778044 (or 585778040 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 23431121320 its reverse (2312113432), we get a palindrome (25743234752).

It can be divided in two parts, 2343112 and 1320, that added together give a palindrome (2344432).

The spelling of 23431121320 in words is "twenty-three billion, four hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty".