18503450374427 has 2 divisors, whose sum is σ = 18503450374428. Its totient is φ = 18503450374426.

The previous prime is 18503450374369. The next prime is 18503450374483. The reversal of 18503450374427 is 72447305430581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18503450374427 - 2²² = 18503446180123 is a prime.

It is not a weakly prime, because it can be changed into another prime (18503452374427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9251725187213 + 9251725187214.

It is an arithmetic number, because the mean of its divisors is an integer number (9251725187214).

Almost surely, 2^{18503450374427} is an apocalyptic number.

18503450374427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18503450374427 is an equidigital number, since it uses as much as digits as its factorization.

18503450374427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 53.

The spelling of 18503450374427 in words is "eighteen trillion, five hundred three billion, four hundred fifty million, three hundred seventy-four thousand, four hundred twenty-seven".