18398773941 has 4 divisors (see below), whose sum is σ = 24531698592. Its totient is φ = 12265849292.

The previous prime is 18398773879. The next prime is 18398773961. The reversal of 18398773941 is 14937789381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18398773941 - 2³⁰ = 17325032117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18398773961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066462321 + ... + 3066462326.

It is an arithmetic number, because the mean of its divisors is an integer number (6132924648).

Almost surely, 2^18398773941 is an apocalyptic number.

It is an amenable number.

18398773941 is a deficient number, since it is larger than the sum of its proper divisors (6132924651).

18398773941 is an equidigital number, since it uses as much as digits as its factorization.

18398773941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132924650.

The product of its digits is 9144576, while the sum is 60.

The spelling of 18398773941 in words is "eighteen billion, three hundred ninety-eight million, seven hundred seventy-three thousand, nine hundred forty-one".