12312054520 has 16 divisors (see below), whose sum is σ = 27702122760. Its totient is φ = 4924821792.

The previous prime is 12312054493. The next prime is 12312054527. The reversal of 12312054520 is 2545021321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312054527) 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, 153900642 + ... + 153900721.

Almost surely, 2^12312054520 is an apocalyptic number.

12312054520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312054520 is an abundant number, since it is smaller than the sum of its proper divisors (15390068240).

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

12312054520 is a wasteful number, since it uses less digits than its factorization.

12312054520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307801374 (or 307801370 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 12312054520 its reverse (2545021321), we get a palindrome (14857075841).

The spelling of 12312054520 in words is "twelve billion, three hundred twelve million, fifty-four thousand, five hundred twenty".