20662920 has 48 divisors (see below), whose sum is σ = 67155660. Its totient is φ = 5510016.

The previous prime is 20662903. The next prime is 20662931. The reversal of 20662920 is 2926602.

It can be written as a sum of positive squares in 2 ways, for example, as 18096516 + 2566404 = 4254^2 + 1602^2 .

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 11 ways as a sum of consecutive naturals, for example, 28339 + ... + 29058.

Almost surely, 2^20662920 is an apocalyptic number.

20662920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662920 is an abundant number, since it is smaller than the sum of its proper divisors (46492740).

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

20662920 is a wasteful number, since it uses less digits than its factorization.

20662920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57414 (or 57407 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20662920 is about 4545.6484685906. The cubic root of 20662920 is about 274.4082924959.

The spelling of 20662920 in words is "twenty million, six hundred sixty-two thousand, nine hundred twenty".