20718846 has 12 divisors (see below), whose sum is σ = 44890872. Its totient is φ = 6906276.

The previous prime is 20718839. The next prime is 20718851. The reversal of 20718846 is 64881702.

It is a self number, because there is not a number n which added to its sum of digits gives 20718846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575506 + ... + 575541.

It is an arithmetic number, because the mean of its divisors is an integer number (3740906).

Almost surely, 2^20718846 is an apocalyptic number.

20718846 is an abundant number, since it is smaller than the sum of its proper divisors (24172026).

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

20718846 is a wasteful number, since it uses less digits than its factorization.

20718846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151055 (or 1151052 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 20718846 is about 4551.7959093088. The cubic root of 20718846 is about 274.6556394883.

The spelling of 20718846 in words is "twenty million, seven hundred eighteen thousand, eight hundred forty-six".