18874731859 has 4 divisors (see below), whose sum is σ = 18877745104. Its totient is φ = 18871718616.

The previous prime is 18874731853. The next prime is 18874731907. The reversal of 18874731859 is 95813747881.

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

It is a cyclic number.

It is not a de Polignac number, because 18874731859 - 2³³ = 10284797267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18874731797 and 18874731806.

It is not an unprimeable number, because it can be changed into a prime (18874731853) 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, 1497207 + ... + 1509760.

It is an arithmetic number, because the mean of its divisors is an integer number (4719436276).

Almost surely, 2^18874731859 is an apocalyptic number.

18874731859 is a deficient number, since it is larger than the sum of its proper divisors (3013245).

18874731859 is an equidigital number, since it uses as much as digits as its factorization.

18874731859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013244.

The product of its digits is 13547520, while the sum is 61.

The spelling of 18874731859 in words is "eighteen billion, eight hundred seventy-four million, seven hundred thirty-one thousand, eight hundred fifty-nine".