18375969943 has 2 divisors, whose sum is σ = 18375969944. Its totient is φ = 18375969942.

The previous prime is 18375969923. The next prime is 18375970001. The reversal of 18375969943 is 34996957381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18375969943 - 2³³ = 9786035351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18375969923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9187984971 + 9187984972.

It is an arithmetic number, because the mean of its divisors is an integer number (9187984972).

Almost surely, 2^18375969943 is an apocalyptic number.

18375969943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18375969943 is an equidigital number, since it uses as much as digits as its factorization.

18375969943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 64.

The spelling of 18375969943 in words is "eighteen billion, three hundred seventy-five million, nine hundred sixty-nine thousand, nine hundred forty-three".