18855885589 has 8 divisors (see below), whose sum is σ = 19851196640. Its totient is φ = 17860864176.

The previous prime is 18855885571. The next prime is 18855885611. The reversal of 18855885589 is 98558855881.

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 18855885589 - 2⁹ = 18855885077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18855885569) 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, 68254 + ... + 205840.

It is an arithmetic number, because the mean of its divisors is an integer number (2481399580).

Almost surely, 2^18855885589 is an apocalyptic number.

18855885589 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18855885589 is a deficient number, since it is larger than the sum of its proper divisors (995311051).

18855885589 is a wasteful number, since it uses less digits than its factorization.

18855885589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144819.

The product of its digits is 184320000, while the sum is 70.

The spelling of 18855885589 in words is "eighteen billion, eight hundred fifty-five million, eight hundred eighty-five thousand, five hundred eighty-nine".