18399810249982 has 16 divisors (see below), whose sum is σ = 31986792870912. Its totient is φ = 7774567710840.

The previous prime is 18399810249959. The next prime is 18399810249983. The reversal of 18399810249982 is 28994201899381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18399810249983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9255436758 + ... + 9255438745.

It is an arithmetic number, because the mean of its divisors is an integer number (1999174554432).

Almost surely, 2^{18399810249982} is an apocalyptic number.

18399810249982 is a deficient number, since it is larger than the sum of its proper divisors (13586982620930).

18399810249982 is a wasteful number, since it uses less digits than its factorization.

18399810249982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510875583.

The product of its (nonzero) digits is 161243136, while the sum is 73.

The spelling of 18399810249982 in words is "eighteen trillion, three hundred ninety-nine billion, eight hundred ten million, two hundred forty-nine thousand, nine hundred eighty-two".