18938170959 has 32 divisors (see below), whose sum is σ = 25832031168. Its totient is φ = 12337920000.

The previous prime is 18938170949. The next prime is 18938170963. The reversal of 18938170959 is 95907183981.

It is not a de Polignac number, because 18938170959 - 2⁷ = 18938170831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18938170949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30893937 + ... + 30894549.

It is an arithmetic number, because the mean of its divisors is an integer number (807250974).

Almost surely, 2^18938170959 is an apocalyptic number.

18938170959 is a deficient number, since it is larger than the sum of its proper divisors (6893860209).

18938170959 is a wasteful number, since it uses less digits than its factorization.

18938170959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its (nonzero) digits is 4898880, while the sum is 60.

The spelling of 18938170959 in words is "eighteen billion, nine hundred thirty-eight million, one hundred seventy thousand, nine hundred fifty-nine".