18644122 has 16 divisors (see below), whose sum is σ = 33351552. Its totient is φ = 7642800.

The previous prime is 18644107. The next prime is 18644173. The reversal of 18644122 is 22144681.

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 7 ways as a sum of consecutive naturals, for example, 28629 + ... + 29272.

It is an arithmetic number, because the mean of its divisors is an integer number (2084472).

Almost surely, 2^18644122 is an apocalyptic number.

18644122 is a deficient number, since it is larger than the sum of its proper divisors (14707430).

18644122 is a wasteful number, since it uses less digits than its factorization.

18644122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57933.

The product of its digits is 3072, while the sum is 28.

The square root of 18644122 is about 4317.8839725032. The cubic root of 18644122 is about 265.1636440300.

The spelling of 18644122 in words is "eighteen million, six hundred forty-four thousand, one hundred twenty-two".