18511494339 has 16 divisors (see below), whose sum is σ = 27497181600. Its totient is φ = 10998871296.

The previous prime is 18511494311. The next prime is 18511494413. The reversal of 18511494339 is 93349411581.

It is not a de Polignac number, because 18511494339 - 2¹⁵ = 18511461571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18511494739) 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, 8182554 + ... + 8184815.

It is an arithmetic number, because the mean of its divisors is an integer number (1718573850).

Almost surely, 2^18511494339 is an apocalyptic number.

18511494339 is a deficient number, since it is larger than the sum of its proper divisors (8985687261).

18511494339 is a wasteful number, since it uses less digits than its factorization.

18511494339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16367414.

The product of its digits is 466560, while the sum is 48.

The spelling of 18511494339 in words is "eighteen billion, five hundred eleven million, four hundred ninety-four thousand, three hundred thirty-nine".