18122939142 has 128 divisors (see below), whose sum is σ = 46565756928. Its totient is φ = 4564771200.

The previous prime is 18122939129. The next prime is 18122939167. The reversal of 18122939142 is 24193922181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18122939094 and 18122939103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5656513 + ... + 5659715.

It is an arithmetic number, because the mean of its divisors is an integer number (363794976).

Almost surely, 2^18122939142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18122939142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23282878464).

18122939142 is an abundant number, since it is smaller than the sum of its proper divisors (28442817786).

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

18122939142 is a wasteful number, since it uses less digits than its factorization.

18122939142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594.

The product of its digits is 62208, while the sum is 42.

The spelling of 18122939142 in words is "eighteen billion, one hundred twenty-two million, nine hundred thirty-nine thousand, one hundred forty-two".