20641804 has 12 divisors (see below), whose sum is σ = 36805104. Its totient is φ = 10126064.

The previous prime is 20641769. The next prime is 20641811. The reversal of 20641804 is 40814602.

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, 48472 + ... + 48895.

It is an arithmetic number, because the mean of its divisors is an integer number (3067092).

Almost surely, 2^20641804 is an apocalyptic number.

It is an amenable number.

20641804 is a deficient number, since it is larger than the sum of its proper divisors (16163300).

20641804 is a wasteful number, since it uses less digits than its factorization.

20641804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97424 (or 97422 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20641804 is about 4543.3252139815. The cubic root of 20641804 is about 274.3147855368.

The spelling of 20641804 in words is "twenty million, six hundred forty-one thousand, eight hundred four".