18345193783975 has 6 divisors (see below), whose sum is σ = 22748040292160. Its totient is φ = 14676155027160.

The previous prime is 18345193783937. The next prime is 18345193784009. The reversal of 18345193783975 is 57938739154381.

It is a de Polignac number, because none of the positive numbers 2^k-18345193783975 is a prime.

It is a super-2 number, since 2×18345193783975² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18345193783898 and 18345193783907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 366903875655 + ... + 366903875704.

Almost surely, 2^{18345193783975} is an apocalyptic number.

18345193783975 is a deficient number, since it is larger than the sum of its proper divisors (4402846508185).

18345193783975 is an equidigital number, since it uses as much as digits as its factorization.

18345193783975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733807751369 (or 733807751364 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 73.

The spelling of 18345193783975 in words is "eighteen trillion, three hundred forty-five billion, one hundred ninety-three million, seven hundred eighty-three thousand, nine hundred seventy-five".