20950164 has 30 divisors (see below), whose sum is σ = 54768714. Its totient is φ = 6983280.

The previous prime is 20950147. The next prime is 20950169. The reversal of 20950164 is 46105902.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 9253764 = 3420^2 + 3042^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950169) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32007 + ... + 32654.

Almost surely, 2^20950164 is an apocalyptic number.

It is an amenable number.

20950164 is an abundant number, since it is smaller than the sum of its proper divisors (33818550).

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

20950164 is a wasteful number, since it uses less digits than its factorization.

20950164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64677 (or 64666 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20950164 is about 4577.1349117106. The cubic root of 20950164 is about 275.6740007286.

The spelling of 20950164 in words is "twenty million, nine hundred fifty thousand, one hundred sixty-four".