20304764 has 12 divisors (see below), whose sum is σ = 35586600. Its totient is φ = 10137168.

The previous prime is 20304763. The next prime is 20304769. The reversal of 20304764 is 46740302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479 + ... + 6390.

It is an arithmetic number, because the mean of its divisors is an integer number (2965550).

Almost surely, 2^20304764 is an apocalyptic number.

It is an amenable number.

20304764 is a deficient number, since it is larger than the sum of its proper divisors (15281836).

20304764 is a wasteful number, since it uses less digits than its factorization.

20304764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612 (or 7610 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20304764 is about 4506.0807804566. The cubic root of 20304764 is about 272.8135783554.

The spelling of 20304764 in words is "twenty million, three hundred four thousand, seven hundred sixty-four".