20266856 has 16 divisors (see below), whose sum is σ = 40235940. Its totient is φ = 9537280.

The previous prime is 20266849. The next prime is 20266867. The reversal of 20266856 is 65866202.

It can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 5134756 = 3890^2 + 2266^2 .

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, 74375 + ... + 74646.

Almost surely, 2^20266856 is an apocalyptic number.

It is an amenable number.

20266856 is a deficient number, since it is larger than the sum of its proper divisors (19969084).

20266856 is a wasteful number, since it uses less digits than its factorization.

20266856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149044 (or 149040 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20266856 is about 4501.8724993052. The cubic root of 20266856 is about 272.6436960608.

The spelling of 20266856 in words is "twenty million, two hundred sixty-six thousand, eight hundred fifty-six".