20197056 has 112 divisors (see below), whose sum is σ = 59545728. Its totient is φ = 5990400.

The previous prime is 20197007. The next prime is 20197069. The reversal of 20197056 is 65079102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154111 + ... + 154241.

Almost surely, 2^20197056 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 20197056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29772864).

20197056 is an abundant number, since it is smaller than the sum of its proper divisors (39348672).

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

20197056 is a wasteful number, since it uses less digits than its factorization.

20197056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20197056 is about 4494.1134832133. The cubic root of 20197056 is about 272.3303368298.

The spelling of 20197056 in words is "twenty million, one hundred ninety-seven thousand, fifty-six".