18314961197 has 4 divisors (see below), whose sum is σ = 19723804380. Its totient is φ = 16906118016.

The previous prime is 18314961193. The next prime is 18314961199. The reversal of 18314961197 is 79116941381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79116941381 = 37 ⋅2138295713.

It can be written as a sum of positive squares in 2 ways, for example, as 2776341481 + 15538619716 = 52691^2 + 124654^2 .

It is a cyclic number.

It is not a de Polignac number, because 18314961197 - 2² = 18314961193 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 (18314961191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704421572 + ... + 704421597.

It is an arithmetic number, because the mean of its divisors is an integer number (4930951095).

Almost surely, 2^18314961197 is an apocalyptic number.

It is an amenable number.

18314961197 is a deficient number, since it is larger than the sum of its proper divisors (1408843183).

18314961197 is a wasteful number, since it uses less digits than its factorization.

18314961197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408843182.

The product of its digits is 326592, while the sum is 50.

The spelling of 18314961197 in words is "eighteen billion, three hundred fourteen million, nine hundred sixty-one thousand, one hundred ninety-seven".