18070644 has 36 divisors (see below), whose sum is σ = 43596672. Its totient is φ = 5825520.

The previous prime is 18070631. The next prime is 18070667. The reversal of 18070644 is 44607081.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 10749 + ... + 12315.

Almost surely, 2^18070644 is an apocalyptic number.

It is an amenable number.

18070644 is an abundant number, since it is smaller than the sum of its proper divisors (25526028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18070644 is a wasteful number, since it uses less digits than its factorization.

18070644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 18070644 is about 4250.9580096726. The cubic root of 18070644 is about 262.4165430838.

The spelling of 18070644 in words is "eighteen million, seventy thousand, six hundred forty-four".