18922712 has 24 divisors (see below), whose sum is σ = 36029700. Its totient is φ = 9316944.

The previous prime is 18922699. The next prime is 18922723. The reversal of 18922712 is 21722981.

It is a happy number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 49739 + ... + 50117.

Almost surely, 2^18922712 is an apocalyptic number.

It is an amenable number.

18922712 is a deficient number, since it is larger than the sum of its proper divisors (17106988).

18922712 is an equidigital number, since it uses as much as digits as its factorization.

18922712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 460 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 18922712 is about 4350.0243677478. The cubic root of 18922712 is about 266.4778566247.

The spelling of 18922712 in words is "eighteen million, nine hundred twenty-two thousand, seven hundred twelve".