18718718714408 has 64 divisors (see below), whose sum is σ = 35305185864960. Its totient is φ = 9304169688576.

The previous prime is 18718718714401. The next prime is 18718718714413. The reversal of 18718718714408 is 80441781781781.

It is not an unprimeable number, because it can be changed into a prime (18718718714401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3889197410 + ... + 3889202222.

It is an arithmetic number, because the mean of its divisors is an integer number (551643529140).

Almost surely, 2^{18718718714408} is an apocalyptic number.

It is an amenable number.

18718718714408 is a deficient number, since it is larger than the sum of its proper divisors (16586467150552).

18718718714408 is a wasteful number, since it uses less digits than its factorization.

18718718714408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586 (or 8582 counting only the distinct ones).

The product of its (nonzero) digits is 22478848, while the sum is 65.

The spelling of 18718718714408 in words is "eighteen trillion, seven hundred eighteen billion, seven hundred eighteen million, seven hundred fourteen thousand, four hundred eight".