20312668 has 6 divisors (see below), whose sum is σ = 35547176. Its totient is φ = 10156332.

The previous prime is 20312639. The next prime is 20312681. The reversal of 20312668 is 86621302.

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, 2539080 + ... + 2539087.

Almost surely, 2^20312668 is an apocalyptic number.

It is an amenable number.

20312668 is a deficient number, since it is larger than the sum of its proper divisors (15234508).

20312668 is a wasteful number, since it uses less digits than its factorization.

20312668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078171 (or 5078169 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20312668 is about 4506.9577322180. The cubic root of 20312668 is about 272.8489729848.

The spelling of 20312668 in words is "twenty million, three hundred twelve thousand, six hundred sixty-eight".