15420920 has 32 divisors (see below), whose sum is σ = 35547120. Its totient is φ = 6017280.

The previous prime is 15420907. The next prime is 15420931. The reversal of 15420920 is 2902451.

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, 3062 + ... + 6341.

Almost surely, 2^15420920 is an apocalyptic number.

15420920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420920 is an abundant number, since it is smaller than the sum of its proper divisors (20126200).

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

15420920 is a wasteful number, since it uses less digits than its factorization.

15420920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9455 (or 9451 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15420920 is about 3926.9479242791. The cubic root of 15420920 is about 248.9067999558.

The spelling of 15420920 in words is "fifteen million, four hundred twenty thousand, nine hundred twenty".