20764572 has 24 divisors (see below), whose sum is σ = 48646416. Its totient is φ = 6893568.

The previous prime is 20764567. The next prime is 20764577. The reversal of 20764572 is 27546702.

It is an interprime number because it is at equal distance from previous prime (20764567) and next prime (20764577).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764577) 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, 283 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (2026934).

Almost surely, 2^20764572 is an apocalyptic number.

It is an amenable number.

20764572 is an abundant number, since it is smaller than the sum of its proper divisors (27881844).

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

20764572 is a wasteful number, since it uses less digits than its factorization.

20764572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997 (or 6995 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 20764572 is about 4556.8159936517. The cubic root of 20764572 is about 274.8575438481.

The spelling of 20764572 in words is "twenty million, seven hundred sixty-four thousand, five hundred seventy-two".