20056572 has 60 divisors (see below), whose sum is σ = 53028976. Its totient is φ = 6609600.

The previous prime is 20056559. The next prime is 20056579. The reversal of 20056572 is 27565002.

20056572 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 657 + 2 = 666.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056579) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33072 + ... + 33672.

Almost surely, 2^20056572 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 20056572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26514488).

20056572 is an abundant number, since it is smaller than the sum of its proper divisors (32972404).

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

20056572 is a wasteful number, since it uses less digits than its factorization.

20056572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20056572 is about 4478.4564305126. The cubic root of 20056572 is about 271.6974541159.

The spelling of 20056572 in words is "twenty million, fifty-six thousand, five hundred seventy-two".