18419944834 has 4 divisors (see below), whose sum is σ = 27629917254. Its totient is φ = 9209972416.

The previous prime is 18419944811. The next prime is 18419944847. The reversal of 18419944834 is 43844991481.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 18050728609 + 369216225 = 134353^2 + 19215^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4604986207 + ... + 4604986210.

Almost surely, 2^18419944834 is an apocalyptic number.

18419944834 is a deficient number, since it is larger than the sum of its proper divisors (9209972420).

18419944834 is an equidigital number, since it uses as much as digits as its factorization.

18419944834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209972419.

The product of its digits is 3981312, while the sum is 55.

The spelling of 18419944834 in words is "eighteen billion, four hundred nineteen million, nine hundred forty-four thousand, eight hundred thirty-four".