18147079905 has 16 divisors (see below), whose sum is σ = 29743507584. Its totient is φ = 9442382720.

The previous prime is 18147079897. The next prime is 18147079919. The reversal of 18147079905 is 50997074181.

It is a happy number.

It is not a de Polignac number, because 18147079905 - 2³ = 18147079897 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14753109 + ... + 14754338.

It is an arithmetic number, because the mean of its divisors is an integer number (1858969224).

Almost surely, 2^18147079905 is an apocalyptic number.

18147079905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18147079905 is a deficient number, since it is larger than the sum of its proper divisors (11596427679).

18147079905 is a wasteful number, since it uses less digits than its factorization.

18147079905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29507496.

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 18147079905 in words is "eighteen billion, one hundred forty-seven million, seventy-nine thousand, nine hundred five".