18244702197 has 24 divisors (see below), whose sum is σ = 27357287776. Its totient is φ = 12150773712.

The previous prime is 18244702181. The next prime is 18244702199. The reversal of 18244702197 is 79120744281.

18244702197 is a `hidden beast` number, since 18 + 2 + 447 + 0 + 2 + 197 = 666.

It is not a de Polignac number, because 18244702197 - 2⁴ = 18244702181 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 (18244702199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204618 + ... + 279924.

Almost surely, 2^18244702197 is an apocalyptic number.

It is an amenable number.

18244702197 is a deficient number, since it is larger than the sum of its proper divisors (9112585579).

18244702197 is an frugal number, since it uses more digits than its factorization.

18244702197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76319 (or 76307 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 18244702197 in words is "eighteen billion, two hundred forty-four million, seven hundred two thousand, one hundred ninety-seven".