18445500139 has 16 divisors (see below), whose sum is σ = 20204886240. Its totient is φ = 16700002560.

The previous prime is 18445500133. The next prime is 18445500163. The reversal of 18445500139 is 93100554481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18445500139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18445500133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3316549 + ... + 3322105.

It is an arithmetic number, because the mean of its divisors is an integer number (1262805390).

Almost surely, 2^18445500139 is an apocalyptic number.

18445500139 is a deficient number, since it is larger than the sum of its proper divisors (1759386101).

18445500139 is a wasteful number, since it uses less digits than its factorization.

18445500139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 18445500139 in words is "eighteen billion, four hundred forty-five million, five hundred thousand, one hundred thirty-nine".