20878896 has 20 divisors (see below), whose sum is σ = 53937272. Its totient is φ = 6959616.

The previous prime is 20878889. The next prime is 20878901. The reversal of 20878896 is 69887802.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 434977 = 20878896 / (2 + 0 + 8 + 7 + 8 + 8 + 9 + 6).

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, 217441 + ... + 217536.

Almost surely, 2^20878896 is an apocalyptic number.

It is an amenable number.

20878896 is an abundant number, since it is smaller than the sum of its proper divisors (33058376).

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

20878896 is a wasteful number, since it uses less digits than its factorization.

20878896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434988 (or 434982 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 20878896 is about 4569.3430600033. The cubic root of 20878896 is about 275.3610508334.

The spelling of 20878896 in words is "twenty million, eight hundred seventy-eight thousand, eight hundred ninety-six".