17989371859 has 4 divisors (see below), whose sum is σ = 17989743600. Its totient is φ = 17989000120.

The previous prime is 17989371833. The next prime is 17989371887. The reversal of 17989371859 is 95817398971.

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

It is a cyclic number.

It is not a de Polignac number, because 17989371859 - 2²¹ = 17987274707 is a prime.

It is a super-2 number, since 2×17989371859² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17989371794 and 17989371803.

It is not an unprimeable number, because it can be changed into a prime (17989371809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100084 + ... + 214465.

It is an arithmetic number, because the mean of its divisors is an integer number (4497435900).

Almost surely, 2^17989371859 is an apocalyptic number.

17989371859 is a deficient number, since it is larger than the sum of its proper divisors (371741).

17989371859 is an equidigital number, since it uses as much as digits as its factorization.

17989371859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371740.

The product of its digits is 34292160, while the sum is 67.

The spelling of 17989371859 in words is "seventeen billion, nine hundred eighty-nine million, three hundred seventy-one thousand, eight hundred fifty-nine".