18244930644 has 24 divisors (see below), whose sum is σ = 47301672320. Its totient is φ = 6081643512.

The previous prime is 18244930643. The next prime is 18244930657. The reversal of 18244930644 is 44603944281.

It is a self number, because there is not a number n which added to its sum of digits gives 18244930644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18244930643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84467164 + ... + 84467379.

Almost surely, 2^18244930644 is an apocalyptic number.

It is an amenable number.

18244930644 is an abundant number, since it is smaller than the sum of its proper divisors (29056741676).

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

18244930644 is a wasteful number, since it uses less digits than its factorization.

18244930644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168934556 (or 168934548 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 18244930644 in words is "eighteen billion, two hundred forty-four million, nine hundred thirty thousand, six hundred forty-four".