20907792 has 30 divisors (see below), whose sum is σ = 58513182. Its totient is φ = 6969216.

The previous prime is 20907781. The next prime is 20907823. The reversal of 20907792 is 29770902.

It can be written as a sum of positive squares in only one way, i.e., 15872256 + 5035536 = 3984^2 + 2244^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72453 + ... + 72740.

Almost surely, 2^20907792 is an apocalyptic number.

It is an amenable number.

20907792 is an abundant number, since it is smaller than the sum of its proper divisors (37605390).

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

20907792 is a wasteful number, since it uses less digits than its factorization.

20907792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145207 (or 145198 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 20907792 is about 4572.5039092384. The cubic root of 20907792 is about 275.4880237832.

The spelling of 20907792 in words is "twenty million, nine hundred seven thousand, seven hundred ninety-two".