18444380694 has 16 divisors (see below), whose sum is σ = 36903029760. Its totient is φ = 6145748840.

The previous prime is 18444380681. The next prime is 18444380743. The reversal of 18444380694 is 49608344481.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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, 577674 + ... + 608765.

It is an arithmetic number, because the mean of its divisors is an integer number (2306439360).

Almost surely, 2^18444380694 is an apocalyptic number.

18444380694 is an abundant number, since it is smaller than the sum of its proper divisors (18458649066).

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

18444380694 is a wasteful number, since it uses less digits than its factorization.

18444380694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189035.

The product of its (nonzero) digits is 2654208, while the sum is 51.

The spelling of 18444380694 in words is "eighteen billion, four hundred forty-four million, three hundred eighty thousand, six hundred ninety-four".