20390932 has 12 divisors (see below), whose sum is σ = 36835456. Its totient is φ = 9866520.

The previous prime is 20390911. The next prime is 20390941. The reversal of 20390932 is 23909302.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20390932.

It is a congruent number.

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, 82098 + ... + 82345.

Almost surely, 2^20390932 is an apocalyptic number.

It is an amenable number.

20390932 is a deficient number, since it is larger than the sum of its proper divisors (16444524).

20390932 is a wasteful number, since it uses less digits than its factorization.

20390932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164478 (or 164476 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 20390932 is about 4515.6319602022. The cubic root of 20390932 is about 273.1989497390.

The spelling of 20390932 in words is "twenty million, three hundred ninety thousand, nine hundred thirty-two".