18239082418 has 8 divisors (see below), whose sum is σ = 27359459820. Its totient is φ = 9119262480.

The previous prime is 18239082413. The next prime is 18239082427. The reversal of 18239082418 is 81428093281.

It can be written as a sum of positive squares in 2 ways, for example, as 17857778689 + 381303729 = 133633^2 + 19527^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18239082413) 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, 44713 + ... + 196156.

Almost surely, 2^18239082418 is an apocalyptic number.

18239082418 is a deficient number, since it is larger than the sum of its proper divisors (9120377402).

18239082418 is a wasteful number, since it uses less digits than its factorization.

18239082418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278732.

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 18239082418 in words is "eighteen billion, two hundred thirty-nine million, eighty-two thousand, four hundred eighteen".