20808888 has 16 divisors (see below), whose sum is σ = 52022280. Its totient is φ = 6936288.

The previous prime is 20808883. The next prime is 20808889. The reversal of 20808888 is 88880802.

20808888 is a modest number, since divided by 8888 gives 2080 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808881) 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, 433495 + ... + 433542.

Almost surely, 2^20808888 is an apocalyptic number.

It is an amenable number.

20808888 is an abundant number, since it is smaller than the sum of its proper divisors (31213392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20808888 is a wasteful number, since it uses less digits than its factorization.

20808888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867046 (or 867042 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 42.

The square root of 20808888 is about 4561.6760077849. The cubic root of 20808888 is about 275.0529396703.

The spelling of 20808888 in words is "twenty million, eight hundred eight thousand, eight hundred eighty-eight".