20764272 has 20 divisors (see below), whose sum is σ = 53641160. Its totient is φ = 6921408.

The previous prime is 20764243. The next prime is 20764297. The reversal of 20764272 is 27246702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216247 + ... + 216342.

It is an arithmetic number, because the mean of its divisors is an integer number (2682058).

Almost surely, 2^20764272 is an apocalyptic number.

It is an amenable number.

20764272 is an abundant number, since it is smaller than the sum of its proper divisors (32876888).

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

20764272 is a wasteful number, since it uses less digits than its factorization.

20764272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432600 (or 432594 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20764272 is about 4556.7830758113. The cubic root of 20764272 is about 274.8562201567.

The spelling of 20764272 in words is "twenty million, seven hundred sixty-four thousand, two hundred seventy-two".