18115512214 has 8 divisors (see below), whose sum is σ = 27368759880. Its totient is φ = 8992592256.

The previous prime is 18115512127. The next prime is 18115512221. The reversal of 18115512214 is 41221551181.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32581579 + ... + 32582134.

It is an arithmetic number, because the mean of its divisors is an integer number (3421094985).

Almost surely, 2^18115512214 is an apocalyptic number.

18115512214 is a deficient number, since it is larger than the sum of its proper divisors (9253247666).

18115512214 is a wasteful number, since it uses less digits than its factorization.

18115512214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65163854.

The product of its digits is 3200, while the sum is 31.

The spelling of 18115512214 in words is "eighteen billion, one hundred fifteen million, five hundred twelve thousand, two hundred fourteen".