18689331889 has 8 divisors (see below), whose sum is σ = 18844939008. Its totient is φ = 18534245280.

The previous prime is 18689331853. The next prime is 18689331907. The reversal of 18689331889 is 98813398681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18689331889 - 2¹⁹ = 18688807601 is a prime.

It is a super-2 number, since 2×18689331889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18689331889.

It is not an unprimeable number, because it can be changed into a prime (18689331839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57852 + ... + 201805.

It is an arithmetic number, because the mean of its divisors is an integer number (2355617376).

Almost surely, 2^18689331889 is an apocalyptic number.

It is an amenable number.

18689331889 is a deficient number, since it is larger than the sum of its proper divisors (155607119).

18689331889 is a wasteful number, since it uses less digits than its factorization.

18689331889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260255.

The product of its digits is 17915904, while the sum is 64.

The spelling of 18689331889 in words is "eighteen billion, six hundred eighty-nine million, three hundred thirty-one thousand, eight hundred eighty-nine".