18128044319 has 16 divisors (see below), whose sum is σ = 22641396480. Its totient is φ = 14100624960.

The previous prime is 18128044307. The next prime is 18128044339. The reversal of 18128044319 is 91344082181.

It is a cyclic number.

It is not a de Polignac number, because 18128044319 - 2⁸ = 18128044063 is a prime.

It is a super-2 number, since 2×18128044319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18128044339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165734 + ... + 252435.

It is an arithmetic number, because the mean of its divisors is an integer number (1415087280).

Almost surely, 2^18128044319 is an apocalyptic number.

18128044319 is a deficient number, since it is larger than the sum of its proper divisors (4513352161).

18128044319 is a wasteful number, since it uses less digits than its factorization.

18128044319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418750.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 18128044319 in words is "eighteen billion, one hundred twenty-eight million, forty-four thousand, three hundred nineteen".