20128056 has 32 divisors (see below), whose sum is σ = 54191760. Its totient is φ = 6193152.

The previous prime is 20128033. The next prime is 20128061. The reversal of 20128056 is 65082102.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 31945 + ... + 32568.

Almost surely, 2^20128056 is an apocalyptic number.

20128056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20128056 is an abundant number, since it is smaller than the sum of its proper divisors (34063704).

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

20128056 is a wasteful number, since it uses less digits than its factorization.

20128056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64535 (or 64531 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20128056 is about 4486.4302067457. The cubic root of 20128056 is about 272.0198587000.

The spelling of 20128056 in words is "twenty million, one hundred twenty-eight thousand, fifty-six".