18722064 has 20 divisors (see below), whose sum is σ = 48365456. Its totient is φ = 6240672.

The previous prime is 18722051. The next prime is 18722089. The reversal of 18722064 is 46022781.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194974 + ... + 195069.

Almost surely, 2^18722064 is an apocalyptic number.

It is an amenable number.

18722064 is an abundant number, since it is smaller than the sum of its proper divisors (29643392).

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

18722064 is a wasteful number, since it uses less digits than its factorization.

18722064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390054 (or 390048 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 18722064 is about 4326.9000450669. The cubic root of 18722064 is about 265.5326370269.

The spelling of 18722064 in words is "eighteen million, seven hundred twenty-two thousand, sixty-four".