18538361371 has 2 divisors, whose sum is σ = 18538361372. Its totient is φ = 18538361370.

The previous prime is 18538361339. The next prime is 18538361377. The reversal of 18538361371 is 17316383581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18538361371 - 2⁵ = 18538361339 is a prime.

It is not a weakly prime, because it can be changed into another prime (18538361377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9269180685 + 9269180686.

It is an arithmetic number, because the mean of its divisors is an integer number (9269180686).

Almost surely, 2^18538361371 is an apocalyptic number.

18538361371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18538361371 is an equidigital number, since it uses as much as digits as its factorization.

18538361371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The spelling of 18538361371 in words is "eighteen billion, five hundred thirty-eight million, three hundred sixty-one thousand, three hundred seventy-one".