17989418042 has 4 divisors (see below), whose sum is σ = 26984127066. Its totient is φ = 8994709020.

The previous prime is 17989418033. The next prime is 17989418089. The reversal of 17989418042 is 24081498971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13082555641 + 4906862401 = 114379^2 + 70049^2 .

It is a super-2 number, since 2×17989418042² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4497354509 + ... + 4497354512.

Almost surely, 2^17989418042 is an apocalyptic number.

17989418042 is a deficient number, since it is larger than the sum of its proper divisors (8994709024).

17989418042 is an equidigital number, since it uses as much as digits as its factorization.

17989418042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994709023.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 17989418042 in words is "seventeen billion, nine hundred eighty-nine million, four hundred eighteen thousand, forty-two".