20646044 has 12 divisors (see below), whose sum is σ = 36812664. Its totient is φ = 10128144.

The previous prime is 20646029. The next prime is 20646049. The reversal of 20646044 is 44064602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646049) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 48482 + ... + 48905.

It is an arithmetic number, because the mean of its divisors is an integer number (3067722).

Almost surely, 2^20646044 is an apocalyptic number.

It is an amenable number.

20646044 is a deficient number, since it is larger than the sum of its proper divisors (16166620).

20646044 is a wasteful number, since it uses less digits than its factorization.

20646044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97444 (or 97442 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20646044 is about 4543.7918086110. The cubic root of 20646044 is about 274.3335664383. Note that the first 3 decimals are identical.

The spelling of 20646044 in words is "twenty million, six hundred forty-six thousand, forty-four".