20878808 has 16 divisors (see below), whose sum is σ = 39733080. Its totient is φ = 10283328.

The previous prime is 20878789. The next prime is 20878843. The reversal of 20878808 is 80887802.

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, 18941 + ... + 20012.

Almost surely, 2^20878808 is an apocalyptic number.

It is an amenable number.

20878808 is a deficient number, since it is larger than the sum of its proper divisors (18854272).

20878808 is a wasteful number, since it uses less digits than its factorization.

20878808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39026 (or 39022 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 41.

The square root of 20878808 is about 4569.3334306001. Note that the first 3 decimals coincide. The cubic root of 20878808 is about 275.3606639706.

The spelling of 20878808 in words is "twenty million, eight hundred seventy-eight thousand, eight hundred eight".