18706444 has 12 divisors (see below), whose sum is σ = 32797800. Its totient is φ = 9335648.

The previous prime is 18706439. The next prime is 18706447. The reversal of 18706444 is 44460781.

It is not an unprimeable number, because it can be changed into a prime (18706447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (2733150).

Almost surely, 2^18706444 is an apocalyptic number.

It is an amenable number.

18706444 is a deficient number, since it is larger than the sum of its proper divisors (14091356).

18706444 is a wasteful number, since it uses less digits than its factorization.

18706444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8792 (or 8790 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 18706444 is about 4325.0946810446. The cubic root of 18706444 is about 265.4587709939.

The spelling of 18706444 in words is "eighteen million, seven hundred six thousand, four hundred forty-four".