18013927944 has 64 divisors (see below), whose sum is σ = 45400320000. Its totient is φ = 5956064064.

The previous prime is 18013927937. The next prime is 18013927973. The reversal of 18013927944 is 44972931081.

It is a junction number, because it is equal to n+sod(n) for n = 18013927893 and 18013927902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1995489 + ... + 2004495.

It is an arithmetic number, because the mean of its divisors is an integer number (709380000).

Almost surely, 2^18013927944 is an apocalyptic number.

It is an amenable number.

18013927944 is an abundant number, since it is smaller than the sum of its proper divisors (27386392056).

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

18013927944 is a wasteful number, since it uses less digits than its factorization.

18013927944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682 (or 9678 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 18013927944 in words is "eighteen billion, thirteen million, nine hundred twenty-seven thousand, nine hundred forty-four".