20016656 has 20 divisors (see below), whose sum is σ = 42308304. Its totient is φ = 9098400.

The previous prime is 20016649. The next prime is 20016677. The reversal of 20016656 is 65661002.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56690 + ... + 57041.

Almost surely, 2^20016656 is an apocalyptic number.

It is an amenable number.

20016656 is an abundant number, since it is smaller than the sum of its proper divisors (22291648).

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

20016656 is a wasteful number, since it uses less digits than its factorization.

20016656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113750 (or 113744 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20016656 is about 4473.9977648631. The cubic root of 20016656 is about 271.5170929844.

Adding to 20016656 its reverse (65661002), we get a palindrome (85677658).

The spelling of 20016656 in words is "twenty million, sixteen thousand, six hundred fifty-six".