20818896 has 40 divisors (see below), whose sum is σ = 61466304. Its totient is φ = 5948160.

The previous prime is 20818879. The next prime is 20818909. The reversal of 20818896 is 69881802.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30645 + ... + 31316.

Almost surely, 2^20818896 is an apocalyptic number.

It is an amenable number.

20818896 is an abundant number, since it is smaller than the sum of its proper divisors (40647408).

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

20818896 is a wasteful number, since it uses less digits than its factorization.

20818896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61979 (or 61973 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 20818896 is about 4562.7728411570. The cubic root of 20818896 is about 275.0970280206.

The spelling of 20818896 in words is "twenty million, eight hundred eighteen thousand, eight hundred ninety-six".