20108764 has 24 divisors (see below), whose sum is σ = 39893840. Its totient is φ = 8792064.

The previous prime is 20108761. The next prime is 20108789. The reversal of 20108764 is 46780102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20108761) 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, 9189 + ... + 11164.

Almost surely, 2^20108764 is an apocalyptic number.

It is an amenable number.

20108764 is a deficient number, since it is larger than the sum of its proper divisors (19785076).

20108764 is a wasteful number, since it uses less digits than its factorization.

20108764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20389 (or 20387 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20108764 is about 4484.2796522965. The cubic root of 20108764 is about 271.9329239158.

Adding to 20108764 its reverse (46780102), we get a palindrome (66888866).

The spelling of 20108764 in words is "twenty million, one hundred eight thousand, seven hundred sixty-four".