18137967797186 has 8 divisors (see below), whose sum is σ = 27207254570940. Its totient is φ = 9068882940208.

The previous prime is 18137967797161. The next prime is 18137967797233. The reversal of 18137967797186 is 68179776973181.

It can be written as a sum of positive squares in 2 ways, for example, as 13152263826025 + 4985703971161 = 3626605^2 + 2232869^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18137967797186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50254421 + ... + 50614056.

Almost surely, 2^{18137967797186} is an apocalyptic number.

18137967797186 is a deficient number, since it is larger than the sum of its proper divisors (9069286773754).

18137967797186 is a wasteful number, since it uses less digits than its factorization.

18137967797186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100958388.

The product of its digits is 1344252672, while the sum is 80.

The spelling of 18137967797186 in words is "eighteen trillion, one hundred thirty-seven billion, nine hundred sixty-seven million, seven hundred ninety-seven thousand, one hundred eighty-six".