20568996 has 72 divisors (see below), whose sum is σ = 61361664. Its totient is φ = 5685120.

The previous prime is 20568983. The next prime is 20569037. The reversal of 20568996 is 69986502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6496 + ... + 9128.

Almost surely, 2^20568996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20568996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30680832).

20568996 is an abundant number, since it is smaller than the sum of its proper divisors (40792668).

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

20568996 is a wasteful number, since it uses less digits than its factorization.

20568996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 20568996 is about 4535.3055023890. The cubic root of 20568996 is about 273.9918835396.

The spelling of 20568996 in words is "twenty million, five hundred sixty-eight thousand, nine hundred ninety-six".