20722108 has 12 divisors (see below), whose sum is σ = 39560472. Its totient is φ = 9419120.

The previous prime is 20722073. The next prime is 20722123. The reversal of 20722108 is 80122702.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235435 + ... + 235522.

It is an arithmetic number, because the mean of its divisors is an integer number (3296706).

Almost surely, 2^20722108 is an apocalyptic number.

It is an amenable number.

20722108 is a deficient number, since it is larger than the sum of its proper divisors (18838364).

20722108 is a wasteful number, since it uses less digits than its factorization.

20722108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470972 (or 470970 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20722108 is about 4552.1542153139. The cubic root of 20722108 is about 274.6700527698.

The spelling of 20722108 in words is "twenty million, seven hundred twenty-two thousand, one hundred eight".