12720970520 has 32 divisors (see below), whose sum is σ = 28745046720. Its totient is φ = 5066545920.

The previous prime is 12720970499. The next prime is 12720970541. The reversal of 12720970520 is 2507902721.

It is an interprime number because it is at equal distance from previous prime (12720970499) and next prime (12720970541).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673136 + ... + 691775.

It is an arithmetic number, because the mean of its divisors is an integer number (898282710).

Almost surely, 2^12720970520 is an apocalyptic number.

12720970520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12720970520 is an abundant number, since it is smaller than the sum of its proper divisors (16024076200).

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

12720970520 is a wasteful number, since it uses less digits than its factorization.

12720970520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365155 (or 1365151 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 12720970520 in words is "twelve billion, seven hundred twenty million, nine hundred seventy thousand, five hundred twenty".