20080656 has 160 divisors (see below), whose sum is σ = 62853120. Its totient is φ = 6120576.

The previous prime is 20080589. The next prime is 20080661. The reversal of 20080656 is 65608002.

20080656 is a `hidden beast` number, since 2 + 0 + 0 + 8 + 0 + 656 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427225 + ... + 427271.

It is an arithmetic number, because the mean of its divisors is an integer number (392832).

Almost surely, 2^20080656 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 20080656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31426560).

20080656 is an abundant number, since it is smaller than the sum of its proper divisors (42772464).

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

20080656 is a wasteful number, since it uses less digits than its factorization.

20080656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20080656 is about 4481.1444966660. The cubic root of 20080656 is about 271.8061623580.

Adding to 20080656 its reverse (65608002), we get a palindrome (85688658).

It can be divided in two parts, 20080 and 656, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20080656 in words is "twenty million, eighty thousand, six hundred fifty-six".