20804670 has 48 divisors (see below), whose sum is σ = 54355392. Its totient is φ = 5520960.

The previous prime is 20804659. The next prime is 20804681. The reversal of 20804670 is 7640802.

It is an interprime number because it is at equal distance from previous prime (20804659) and next prime (20804681).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23964 + ... + 24816.

It is an arithmetic number, because the mean of its divisors is an integer number (1132404).

Almost surely, 2^20804670 is an apocalyptic number.

20804670 is an abundant number, since it is smaller than the sum of its proper divisors (33550722).

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

20804670 is a wasteful number, since it uses less digits than its factorization.

20804670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20804670 is about 4561.2136542811. The cubic root of 20804670 is about 275.0343538350.

The spelling of 20804670 in words is "twenty million, eight hundred four thousand, six hundred seventy".