17999884993 has 4 divisors (see below), whose sum is σ = 18114534100. Its totient is φ = 17885235888.

The previous prime is 17999884951. The next prime is 17999884999. The reversal of 17999884993 is 39948899971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39948899971 = 1223 ⋅32664677.

It can be written as a sum of positive squares in 2 ways, for example, as 3607563969 + 14392321024 = 60063^2 + 119968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17999884993 is a prime.

It is a super-2 number, since 2×17999884993² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17999884999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57324318 + ... + 57324631.

It is an arithmetic number, because the mean of its divisors is an integer number (4528633525).

Almost surely, 2^17999884993 is an apocalyptic number.

It is an amenable number.

17999884993 is a deficient number, since it is larger than the sum of its proper divisors (114649107).

17999884993 is a wasteful number, since it uses less digits than its factorization.

17999884993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114649106.

The product of its digits is 317447424, while the sum is 76.

The spelling of 17999884993 in words is "seventeen billion, nine hundred ninety-nine million, eight hundred eighty-four thousand, nine hundred ninety-three".