20090764 has 6 divisors (see below), whose sum is σ = 35158844. Its totient is φ = 10045380.

The previous prime is 20090747. The next prime is 20090773. The reversal of 20090764 is 46709002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2511342 + ... + 2511349.

Almost surely, 2^20090764 is an apocalyptic number.

It is an amenable number.

20090764 is a deficient number, since it is larger than the sum of its proper divisors (15068080).

20090764 is a wasteful number, since it uses less digits than its factorization.

20090764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5022695 (or 5022693 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20090764 is about 4482.2721916457. The cubic root of 20090764 is about 271.8517610647.

Adding to 20090764 its reverse (46709002), we get a palindrome (66799766).

The spelling of 20090764 in words is "twenty million, ninety thousand, seven hundred sixty-four".