20802875 has 16 divisors (see below), whose sum is σ = 26146848. Its totient is φ = 16524000.

The previous prime is 20802857. The next prime is 20802907. The reversal of 20802875 is 57820802.

It is not a de Polignac number, because 20802875 - 2¹⁸ = 20540731 is a prime.

It is a Duffinian 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, 19865 + ... + 20885.

It is an arithmetic number, because the mean of its divisors is an integer number (1634178).

Almost surely, 2^20802875 is an apocalyptic number.

20802875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20802875 is a deficient number, since it is larger than the sum of its proper divisors (5343973).

20802875 is a wasteful number, since it uses less digits than its factorization.

20802875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 20802875 is about 4561.0168822314. The cubic root of 20802875 is about 275.0264437381.

The spelling of 20802875 in words is "twenty million, eight hundred two thousand, eight hundred seventy-five".