18147317739 has 8 divisors (see below), whose sum is σ = 24850381200. Its totient is φ = 11771233056.

The previous prime is 18147317731. The next prime is 18147317759. The reversal of 18147317739 is 93771374181.

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 18147317739 - 2³ = 18147317731 is a prime.

It is a super-2 number, since 2×18147317739² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18147317691 and 18147317700.

It is not an unprimeable number, because it can be changed into a prime (18147317731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81744564 + ... + 81744785.

It is an arithmetic number, because the mean of its divisors is an integer number (3106297650).

Almost surely, 2^18147317739 is an apocalyptic number.

18147317739 is a deficient number, since it is larger than the sum of its proper divisors (6703063461).

18147317739 is a wasteful number, since it uses less digits than its factorization.

18147317739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163489389.

The product of its digits is 889056, while the sum is 51.

The spelling of 18147317739 in words is "eighteen billion, one hundred forty-seven million, three hundred seventeen thousand, seven hundred thirty-nine".