18161294542 has 8 divisors (see below), whose sum is σ = 27271587600. Its totient is φ = 9070765344.

The previous prime is 18161294519. The next prime is 18161294549. The reversal of 18161294542 is 24549216181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18161294549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4938667 + ... + 4942342.

It is an arithmetic number, because the mean of its divisors is an integer number (3408948450).

Almost surely, 2^18161294542 is an apocalyptic number.

18161294542 is a deficient number, since it is larger than the sum of its proper divisors (9110293058).

18161294542 is an equidigital number, since it uses as much as digits as its factorization.

18161294542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881930.

The product of its digits is 138240, while the sum is 43.

The spelling of 18161294542 in words is "eighteen billion, one hundred sixty-one million, two hundred ninety-four thousand, five hundred forty-two".