20399792 has 20 divisors (see below), whose sum is σ = 45171216. Its totient is φ = 8742720.

The previous prime is 20399773. The next prime is 20399807. The reversal of 20399792 is 29799302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90959 + ... + 91182.

Almost surely, 2^20399792 is an apocalyptic number.

It is an amenable number.

20399792 is an abundant number, since it is smaller than the sum of its proper divisors (24771424).

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

20399792 is a wasteful number, since it uses less digits than its factorization.

20399792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182156 (or 182150 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 20399792 is about 4516.6128902088. The cubic root of 20399792 is about 273.2385129494.

The spelling of 20399792 in words is "twenty million, three hundred ninety-nine thousand, seven hundred ninety-two".