20659932 has 18 divisors (see below), whose sum is σ = 52223808. Its totient is φ = 6886632.

The previous prime is 20659927. The next prime is 20659943. The reversal of 20659932 is 23995602.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 573887 = 20659932 / (2 + 0 + 6 + 5 + 9 + 9 + 3 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286908 + ... + 286979.

Almost surely, 2^20659932 is an apocalyptic number.

It is an amenable number.

20659932 is an abundant number, since it is smaller than the sum of its proper divisors (31563876).

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

20659932 is a wasteful number, since it uses less digits than its factorization.

20659932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573897 (or 573892 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20659932 is about 4545.3197907298. The cubic root of 20659932 is about 274.3950647510.

The spelling of 20659932 in words is "twenty million, six hundred fifty-nine thousand, nine hundred thirty-two".