20646052 has 18 divisors (see below), whose sum is σ = 42029862. Its totient is φ = 8848224.

The previous prime is 20646049. The next prime is 20646053. The reversal of 20646052 is 25064602.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 70756 = 4536^2 + 266^2 .

It is not an unprimeable number, because it can be changed into a prime (20646053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52473 + ... + 52864.

Almost surely, 2^20646052 is an apocalyptic number.

It is an amenable number.

20646052 is an abundant number, since it is smaller than the sum of its proper divisors (21383810).

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

20646052 is a wasteful number, since it uses less digits than its factorization.

20646052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105355 (or 105346 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20646052 is about 4543.7926889329. The cubic root of 20646052 is about 274.3336018715. Note that the first 3 decimals are identical.

The spelling of 20646052 in words is "twenty million, six hundred forty-six thousand, fifty-two".