20878496 has 12 divisors (see below), whose sum is σ = 41104602. Its totient is φ = 10439232.

The previous prime is 20878477. The next prime is 20878513. The reversal of 20878496 is 69487802.

It can be written as a sum of positive squares in only one way, i.e., 20830096 + 48400 = 4564^2 + 220^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326195 + ... + 326258.

Almost surely, 2^20878496 is an apocalyptic number.

It is an amenable number.

20878496 is a deficient number, since it is larger than the sum of its proper divisors (20226106).

20878496 is an equidigital number, since it uses as much as digits as its factorization.

20878496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652463 (or 652455 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20878496 is about 4569.2992898255. The cubic root of 20878496 is about 275.3592923572.

The spelling of 20878496 in words is "twenty million, eight hundred seventy-eight thousand, four hundred ninety-six".