18438416128 has 36 divisors (see below), whose sum is σ = 40150704888. Its totient is φ = 8381096960.

The previous prime is 18438416119. The next prime is 18438416131. The reversal of 18438416128 is 82161483481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271051 + ... + 3276682.

It is an arithmetic number, because the mean of its divisors is an integer number (1115297358).

Almost surely, 2^18438416128 is an apocalyptic number.

It is an amenable number.

18438416128 is an abundant number, since it is smaller than the sum of its proper divisors (21712288760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18438416128 is an equidigital number, since it uses as much as digits as its factorization.

18438416128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547760 (or 6547746 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The spelling of 18438416128 in words is "eighteen billion, four hundred thirty-eight million, four hundred sixteen thousand, one hundred twenty-eight".