18313192198738 has 8 divisors (see below), whose sum is σ = 27474446580732. Its totient is φ = 9155043338496.

The previous prime is 18313192198649. The next prime is 18313192198747. The reversal of 18313192198738 is 83789129131381.

It can be written as a sum of positive squares in 2 ways, for example, as 18131866971409 + 181325227329 = 4258153^2 + 425823^2 .

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 18313192198738.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776365695 + ... + 776389282.

Almost surely, 2^{18313192198738} is an apocalyptic number.

18313192198738 is a deficient number, since it is larger than the sum of its proper divisors (9161254381994).

18313192198738 is a wasteful number, since it uses less digits than its factorization.

18313192198738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552760876.

The product of its digits is 15676416, while the sum is 64.

The spelling of 18313192198738 in words is "eighteen trillion, three hundred thirteen billion, one hundred ninety-two million, one hundred ninety-eight thousand, seven hundred thirty-eight".