18197597019 has 12 divisors (see below), whose sum is σ = 28224844584. Its totient is φ = 10398626784.

The previous prime is 18197597017. The next prime is 18197597051. The reversal of 18197597019 is 91079579181.

It is not a de Polignac number, because 18197597019 - 2¹ = 18197597017 is a prime.

It is a super-2 number, since 2×18197597019² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18197597019.

It is not an unprimeable number, because it can be changed into a prime (18197597017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61896442 + ... + 61896735.

It is an arithmetic number, because the mean of its divisors is an integer number (2352070382).

Almost surely, 2^18197597019 is an apocalyptic number.

18197597019 is a deficient number, since it is larger than the sum of its proper divisors (10027247565).

18197597019 is a wasteful number, since it uses less digits than its factorization.

18197597019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123793194 (or 123793187 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 57.

The spelling of 18197597019 in words is "eighteen billion, one hundred ninety-seven million, five hundred ninety-seven thousand, nineteen".