18019471589 has 8 divisors (see below), whose sum is σ = 21805075008. Its totient is φ = 14536716480.

The previous prime is 18019471573. The next prime is 18019471609. The reversal of 18019471589 is 98517491081.

It is a happy number.

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 18019471589 - 2⁴ = 18019471573 is a prime.

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 18019471589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019471559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75711947 + ... + 75712184.

It is an arithmetic number, because the mean of its divisors is an integer number (2725634376).

Almost surely, 2^18019471589 is an apocalyptic number.

It is an amenable number.

18019471589 is a deficient number, since it is larger than the sum of its proper divisors (3785603419).

18019471589 is a wasteful number, since it uses less digits than its factorization.

18019471589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151424155.

The product of its (nonzero) digits is 725760, while the sum is 53.

The spelling of 18019471589 in words is "eighteen billion, nineteen million, four hundred seventy-one thousand, five hundred eighty-nine".