18934940395 has 12 divisors (see below), whose sum is σ = 26431631424. Its totient is φ = 12983958960.

The previous prime is 18934940377. The next prime is 18934940429. The reversal of 18934940395 is 59304943981.

It is a happy number.

It is not a de Polignac number, because 18934940395 - 2⁷ = 18934940267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38642491 + ... + 38642980.

It is an arithmetic number, because the mean of its divisors is an integer number (2202635952).

Almost surely, 2^18934940395 is an apocalyptic number.

18934940395 is a deficient number, since it is larger than the sum of its proper divisors (7496691029).

18934940395 is an equidigital number, since it uses as much as digits as its factorization.

18934940395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77285490 (or 77285483 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 18934940395 in words is "eighteen billion, nine hundred thirty-four million, nine hundred forty thousand, three hundred ninety-five".