18668722 has 8 divisors (see below), whose sum is σ = 28150272. Its totient is φ = 9285300.

The previous prime is 18668701. The next prime is 18668753. The reversal of 18668722 is 22786681.

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

It is a super-2 number, since 2×18668722² = 697042362226568, which contains 22 as substring.

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, 24054 + ... + 24817.

It is an arithmetic number, because the mean of its divisors is an integer number (3518784).

Almost surely, 2^18668722 is an apocalyptic number.

18668722 is a deficient number, since it is larger than the sum of its proper divisors (9481550).

18668722 is a wasteful number, since it uses less digits than its factorization.

18668722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49064.

The product of its digits is 64512, while the sum is 40.

The square root of 18668722 is about 4320.7316510054. The cubic root of 18668722 is about 265.2802162273.

The spelling of 18668722 in words is "eighteen million, six hundred sixty-eight thousand, seven hundred twenty-two".