20870922 has 8 divisors (see below), whose sum is σ = 41741856. Its totient is φ = 6956972.

The previous prime is 20870909. The next prime is 20870939. The reversal of 20870922 is 22907802.

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

20870922 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20870922.

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, 1739238 + ... + 1739249.

It is an arithmetic number, because the mean of its divisors is an integer number (5217732).

Almost surely, 2^20870922 is an apocalyptic number.

20870922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20870922 is a wasteful number, since it uses less digits than its factorization.

20870922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478492.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20870922 is about 4568.4704223624. The cubic root of 20870922 is about 275.3259913710.

The spelling of 20870922 in words is "twenty million, eight hundred seventy thousand, nine hundred twenty-two".