18601216518 has 8 divisors (see below), whose sum is σ = 37202433048. Its totient is φ = 6200405504.

The previous prime is 18601216483. The next prime is 18601216547. The reversal of 18601216518 is 81561210681.

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

18601216518 is an admirable number.

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, 1550101371 + ... + 1550101382.

It is an arithmetic number, because the mean of its divisors is an integer number (4650304131).

Almost surely, 2^18601216518 is an apocalyptic number.

18601216518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18601216518 is a wasteful number, since it uses less digits than its factorization.

18601216518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100202758.

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 18601216518 in words is "eighteen billion, six hundred one million, two hundred sixteen thousand, five hundred eighteen".