20868790 has 8 divisors (see below), whose sum is σ = 37563840. Its totient is φ = 8347512.

The previous prime is 20868769. The next prime is 20868823. The reversal of 20868790 is 9786802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 1043430 + ... + 1043449.

It is an arithmetic number, because the mean of its divisors is an integer number (4695480).

Almost surely, 2^20868790 is an apocalyptic number.

20868790 is a deficient number, since it is larger than the sum of its proper divisors (16695050).

20868790 is a wasteful number, since it uses less digits than its factorization.

20868790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086886.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20868790 is about 4568.2370779109. The cubic root of 20868790 is about 275.3166160465.

The spelling of 20868790 in words is "twenty million, eight hundred sixty-eight thousand, seven hundred ninety".