20806364 has 24 divisors (see below), whose sum is σ = 37095408. Its totient is φ = 10209920.

The previous prime is 20806339. The next prime is 20806391. The reversal of 20806364 is 46360802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73904 + ... + 74184.

It is an arithmetic number, because the mean of its divisors is an integer number (1545642).

Almost surely, 2^20806364 is an apocalyptic number.

It is an amenable number.

20806364 is a deficient number, since it is larger than the sum of its proper divisors (16289044).

20806364 is a wasteful number, since it uses less digits than its factorization.

20806364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20806364 is about 4561.3993466918. The cubic root of 20806364 is about 275.0418184339.

The spelling of 20806364 in words is "twenty million, eight hundred six thousand, three hundred sixty-four".