20802885 has 16 divisors (see below), whose sum is σ = 33341760. Its totient is φ = 11075840.

The previous prime is 20802857. The next prime is 20802907. The reversal of 20802885 is 58820802.

It is not a de Polignac number, because 20802885 - 2⁷ = 20802757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14605 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (2083860).

Almost surely, 2^20802885 is an apocalyptic number.

It is an amenable number.

20802885 is a deficient number, since it is larger than the sum of its proper divisors (12538875).

20802885 is a wasteful number, since it uses less digits than its factorization.

20802885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 20802885 is about 4561.0179784781. The cubic root of 20802885 is about 275.0264878068.

The spelling of 20802885 in words is "twenty million, eight hundred two thousand, eight hundred eighty-five".