15979207420 has 48 divisors (see below), whose sum is σ = 37207056096. Its totient is φ = 5715360000.

The previous prime is 15979207403. The next prime is 15979207421. The reversal of 15979207420 is 2470297951.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15979207421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581931 + ... + 608770.

It is an arithmetic number, because the mean of its divisors is an integer number (775147002).

Almost surely, 2^15979207420 is an apocalyptic number.

15979207420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15979207420 is an abundant number, since it is smaller than the sum of its proper divisors (21227848676).

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

15979207420 is a wasteful number, since it uses less digits than its factorization.

15979207420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190782 (or 1190780 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 15979207420 in words is "fifteen billion, nine hundred seventy-nine million, two hundred seven thousand, four hundred twenty".