18722786197 has 8 divisors (see below), whose sum is σ = 18847267040. Its totient is φ = 18598422960.

The previous prime is 18722786183. The next prime is 18722786227. The reversal of 18722786197 is 79168722781.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18722786197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722786107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302422 + ... + 359032.

It is an arithmetic number, because the mean of its divisors is an integer number (2355908380).

Almost surely, 2^18722786197 is an apocalyptic number.

It is an amenable number.

18722786197 is a deficient number, since it is larger than the sum of its proper divisors (124480843).

18722786197 is a wasteful number, since it uses less digits than its factorization.

18722786197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58803.

The product of its digits is 4741632, while the sum is 58.

The spelling of 18722786197 in words is "eighteen billion, seven hundred twenty-two million, seven hundred eighty-six thousand, one hundred ninety-seven".