20646124 has 36 divisors (see below), whose sum is σ = 38536344. Its totient is φ = 9672000.

The previous prime is 20646107. The next prime is 20646137. The reversal of 20646124 is 42164602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157539 + ... + 157669.

It is an arithmetic number, because the mean of its divisors is an integer number (1070454).

Almost surely, 2^20646124 is an apocalyptic number.

It is an amenable number.

20646124 is a deficient number, since it is larger than the sum of its proper divisors (17890220).

20646124 is a wasteful number, since it uses less digits than its factorization.

20646124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20646124 is about 4543.8006118227. The cubic root of 20646124 is about 274.3339207702. Note that the first 3 decimals are identical.

The spelling of 20646124 in words is "twenty million, six hundred forty-six thousand, one hundred twenty-four".