20764648 has 16 divisors (see below), whose sum is σ = 39082500. Its totient is φ = 10342656.

The previous prime is 20764619. The next prime is 20764651. The reversal of 20764648 is 84646702.

It can be written as a sum of positive squares in 2 ways, for example, as 16176484 + 4588164 = 4022^2 + 2142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2673 + ... + 6976.

Almost surely, 2^20764648 is an apocalyptic number.

It is an amenable number.

20764648 is a deficient number, since it is larger than the sum of its proper divisors (18317852).

20764648 is a wasteful number, since it uses less digits than its factorization.

20764648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924 (or 9920 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 20764648 is about 4556.8243328002. The cubic root of 20764648 is about 274.8578791813.

It can be divided in two parts, 20764 and 648, that added together give a palindrome (21412).

The spelling of 20764648 in words is "twenty million, seven hundred sixty-four thousand, six hundred forty-eight".