20889884 has 12 divisors (see below), whose sum is σ = 36590400. Its totient is φ = 10435488.

The previous prime is 20889881. The next prime is 20889901. The reversal of 20889884 is 48898802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20889881) 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, 5552 + ... + 8520.

It is an arithmetic number, because the mean of its divisors is an integer number (3049200).

Almost surely, 2^20889884 is an apocalyptic number.

It is an amenable number.

20889884 is a deficient number, since it is larger than the sum of its proper divisors (15700516).

20889884 is a wasteful number, since it uses less digits than its factorization.

20889884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732 (or 4730 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The square root of 20889884 is about 4570.5452628762. The cubic root of 20889884 is about 275.4093473941.

The spelling of 20889884 in words is "twenty million, eight hundred eighty-nine thousand, eight hundred eighty-four".