12313440520 has 16 divisors (see below), whose sum is σ = 27705241260. Its totient is φ = 4925376192.

The previous prime is 12313440487. The next prime is 12313440533. The reversal of 12313440520 is 2504431321.

It can be written as a sum of positive squares in 2 ways, for example, as 11525740164 + 787700356 = 107358^2 + 28066^2 .

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, 153917967 + ... + 153918046.

Almost surely, 2^12313440520 is an apocalyptic number.

12313440520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12313440520 is an abundant number, since it is smaller than the sum of its proper divisors (15391800740).

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

12313440520 is a wasteful number, since it uses less digits than its factorization.

12313440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307836024 (or 307836020 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12313440520 its reverse (2504431321), we get a palindrome (14817871841).

The spelling of 12313440520 in words is "twelve billion, three hundred thirteen million, four hundred forty thousand, five hundred twenty".