18514216398 has 24 divisors (see below), whose sum is σ = 39079874088. Its totient is φ = 5846593968.

The previous prime is 18514216387. The next prime is 18514216403. The reversal of 18514216398 is 89361241581.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4271661 + ... + 4275992.

It is an arithmetic number, because the mean of its divisors is an integer number (1628328087).

Almost surely, 2^18514216398 is an apocalyptic number.

18514216398 is an abundant number, since it is smaller than the sum of its proper divisors (20565657690).

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

18514216398 is a wasteful number, since it uses less digits than its factorization.

18514216398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547696 (or 8547677 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The spelling of 18514216398 in words is "eighteen billion, five hundred fourteen million, two hundred sixteen thousand, three hundred ninety-eight".