18396111239 has 16 divisors (see below), whose sum is σ = 21148750080. Its totient is φ = 15825519360.

The previous prime is 18396111133. The next prime is 18396111241. The reversal of 18396111239 is 93211169381.

It is a cyclic number.

It is not a de Polignac number, because 18396111239 - 2¹² = 18396107143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18396111239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396111259) 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, 135767 + ... + 234999.

It is an arithmetic number, because the mean of its divisors is an integer number (1321796880).

Almost surely, 2^18396111239 is an apocalyptic number.

18396111239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18396111239 is a deficient number, since it is larger than the sum of its proper divisors (2752638841).

18396111239 is a wasteful number, since it uses less digits than its factorization.

18396111239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100150.

The product of its digits is 69984, while the sum is 44.

The spelling of 18396111239 in words is "eighteen billion, three hundred ninety-six million, one hundred eleven thousand, two hundred thirty-nine".