20196688 has 10 divisors (see below), whose sum is σ = 39131114. Its totient is φ = 10098336.

The previous prime is 20196679. The next prime is 20196721. The reversal of 20196688 is 88669102.

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 4892944 = 3912^2 + 2212^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20196688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631131 + ... + 631162.

Almost surely, 2^20196688 is an apocalyptic number.

It is an amenable number.

20196688 is a deficient number, since it is larger than the sum of its proper divisors (18934426).

20196688 is a wasteful number, since it uses less digits than its factorization.

20196688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262301 (or 1262295 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20196688 is about 4494.0725405805. The cubic root of 20196688 is about 272.3286828236.

The spelling of 20196688 in words is "twenty million, one hundred ninety-six thousand, six hundred eighty-eight".