20889304 has 16 divisors (see below), whose sum is σ = 39832200. Its totient is φ = 10267392.

The previous prime is 20889299. The next prime is 20889347. The reversal of 20889304 is 40398802.

It is a self number, because there is not a number n which added to its sum of digits gives 20889304.

It is a congruent number.

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, 21657 + ... + 22600.

Almost surely, 2^20889304 is an apocalyptic number.

It is an amenable number.

20889304 is a deficient number, since it is larger than the sum of its proper divisors (18942896).

20889304 is a wasteful number, since it uses less digits than its factorization.

20889304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44322 (or 44318 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20889304 is about 4570.4818126758. The cubic root of 20889304 is about 275.4067984906.

The spelling of 20889304 in words is "twenty million, eight hundred eighty-nine thousand, three hundred four".