18698117697 has 48 divisors (see below), whose sum is σ = 33247838208. Its totient is φ = 9890385120.

The previous prime is 18698117693. The next prime is 18698117717. The reversal of 18698117697 is 79671189681.

It is not a de Polignac number, because 18698117697 - 2² = 18698117693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18698117693) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163213 + ... + 253050.

It is an arithmetic number, because the mean of its divisors is an integer number (692663296).

Almost surely, 2^18698117697 is an apocalyptic number.

It is an amenable number.

18698117697 is a deficient number, since it is larger than the sum of its proper divisors (14549720511).

18698117697 is a wasteful number, since it uses less digits than its factorization.

18698117697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416330 (or 416327 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The spelling of 18698117697 in words is "eighteen billion, six hundred ninety-eight million, one hundred seventeen thousand, six hundred ninety-seven".