18042142998 has 64 divisors (see below), whose sum is σ = 40749246720. Its totient is φ = 5275267200.

The previous prime is 18042142981. The next prime is 18042142999. The reversal of 18042142998 is 89924124081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042142999) 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, 4719928 + ... + 4723748.

It is an arithmetic number, because the mean of its divisors is an integer number (636706980).

Almost surely, 2^18042142998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18042142998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20374623360).

18042142998 is an abundant number, since it is smaller than the sum of its proper divisors (22707103722).

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

18042142998 is a wasteful number, since it uses less digits than its factorization.

18042142998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333.

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 18042142998 in words is "eighteen billion, forty-two million, one hundred forty-two thousand, nine hundred ninety-eight".