18244642 has 16 divisors (see below), whose sum is σ = 30159360. Its totient is φ = 8224272.

The previous prime is 18244637. The next prime is 18244669. The reversal of 18244642 is 24644281.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7042 + ... + 9277.

It is an arithmetic number, because the mean of its divisors is an integer number (1884960).

Almost surely, 2^18244642 is an apocalyptic number.

18244642 is a deficient number, since it is larger than the sum of its proper divisors (11914718).

18244642 is a wasteful number, since it uses less digits than its factorization.

18244642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16377.

The product of its digits is 12288, while the sum is 31.

The square root of 18244642 is about 4271.3747201574. The cubic root of 18244642 is about 263.2561033293.

The spelling of 18244642 in words is "eighteen million, two hundred forty-four thousand, six hundred forty-two".