18474273899 has 4 divisors (see below), whose sum is σ = 18514699464. Its totient is φ = 18433848336.

The previous prime is 18474273887. The next prime is 18474273901. The reversal of 18474273899 is 99837247481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18474273899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18474273809) 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, 20212097 + ... + 20213010.

It is an arithmetic number, because the mean of its divisors is an integer number (4628674866).

Almost surely, 2^18474273899 is an apocalyptic number.

18474273899 is a deficient number, since it is larger than the sum of its proper divisors (40425565).

18474273899 is an equidigital number, since it uses as much as digits as its factorization.

18474273899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40425564.

The product of its digits is 24385536, while the sum is 62.

The spelling of 18474273899 in words is "eighteen billion, four hundred seventy-four million, two hundred seventy-three thousand, eight hundred ninety-nine".