18989205352 has 96 divisors (see below), whose sum is σ = 40645382400. Its totient is φ = 8250967296.

The previous prime is 18989205317. The next prime is 18989205371. The reversal of 18989205352 is 25350298981.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 18989205352.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 59902698 + ... + 59903014.

It is an arithmetic number, because the mean of its divisors is an integer number (423389400).

Almost surely, 2^18989205352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18989205352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20322691200).

18989205352 is an abundant number, since it is smaller than the sum of its proper divisors (21656177048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18989205352 is a wasteful number, since it uses less digits than its factorization.

18989205352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 18989205352 in words is "eighteen billion, nine hundred eighty-nine million, two hundred five thousand, three hundred fifty-two".