20646012 has 24 divisors (see below), whose sum is σ = 48254416. Its totient is φ = 6870528.

The previous prime is 20646011. The next prime is 20646013. The reversal of 20646012 is 21064602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20646011) and next prime (20646013).

It is a self number, because there is not a number n which added to its sum of digits gives 20646012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9228 + ... + 11244.

Almost surely, 2^20646012 is an apocalyptic number.

It is an amenable number.

20646012 is an abundant number, since it is smaller than the sum of its proper divisors (27608404).

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

20646012 is a wasteful number, since it uses less digits than its factorization.

20646012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20646012 is about 4543.7882873215. The cubic root of 20646012 is about 274.3334247053. Note that the first 3 decimals are identical.

The spelling of 20646012 in words is "twenty million, six hundred forty-six thousand, twelve".