18090985304 has 64 divisors (see below), whose sum is σ = 39744129600. Its totient is φ = 7558041600.

The previous prime is 18090985249. The next prime is 18090985309. The reversal of 18090985304 is 40358909081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090985309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829664 + ... + 3834384.

It is an arithmetic number, because the mean of its divisors is an integer number (621002025).

Almost surely, 2^18090985304 is an apocalyptic number.

18090985304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18090985304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19872064800).

18090985304 is an abundant number, since it is smaller than the sum of its proper divisors (21653144296).

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

18090985304 is a wasteful number, since it uses less digits than its factorization.

18090985304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6440 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18090985304 in words is "eighteen billion, ninety million, nine hundred eighty-five thousand, three hundred four".