20902668 has 24 divisors (see below), whose sum is σ = 48883968. Its totient is φ = 6951696.

The previous prime is 20902667. The next prime is 20902691. The reversal of 20902668 is 86620902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4305 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (2036832).

Almost surely, 2^20902668 is an apocalyptic number.

It is an amenable number.

20902668 is an abundant number, since it is smaller than the sum of its proper divisors (27981300).

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

20902668 is a wasteful number, since it uses less digits than its factorization.

20902668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973 (or 3971 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20902668 is about 4571.9435692056. The cubic root of 20902668 is about 275.4655167682.

The spelling of 20902668 in words is "twenty million, nine hundred two thousand, six hundred sixty-eight".