18701918697 has 16 divisors (see below), whose sum is σ = 31088904192. Its totient is φ = 9715282320.

The previous prime is 18701918659. The next prime is 18701918761. The reversal of 18701918697 is 79681910781.

It is not a de Polignac number, because 18701918697 - 2⁸ = 18701918441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18701916697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40480113 + ... + 40480574.

It is an arithmetic number, because the mean of its divisors is an integer number (1943056512).

Almost surely, 2^18701918697 is an apocalyptic number.

It is an amenable number.

18701918697 is a deficient number, since it is larger than the sum of its proper divisors (12386985495).

18701918697 is a wasteful number, since it uses less digits than its factorization.

18701918697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80960708.

The product of its (nonzero) digits is 1524096, while the sum is 57.

The spelling of 18701918697 in words is "eighteen billion, seven hundred one million, nine hundred eighteen thousand, six hundred ninety-seven".