18518351739 has 8 divisors (see below), whose sum is σ = 25157006352. Its totient is φ = 12112632480.

The previous prime is 18518351707. The next prime is 18518351743. The reversal of 18518351739 is 93715381581.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18518351739 - 2⁵ = 18518351707 is a prime.

It is a super-2 number, since 2×18518351739² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18518351691 and 18518351700.

It is not an unprimeable number, because it can be changed into a prime (18518351339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58233652 + ... + 58233969.

It is an arithmetic number, because the mean of its divisors is an integer number (3144625794).

Almost surely, 2^18518351739 is an apocalyptic number.

18518351739 is a deficient number, since it is larger than the sum of its proper divisors (6638654613).

18518351739 is a wasteful number, since it uses less digits than its factorization.

18518351739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116467677.

The product of its digits is 907200, while the sum is 51.

The spelling of 18518351739 in words is "eighteen billion, five hundred eighteen million, three hundred fifty-one thousand, seven hundred thirty-nine".