18319085280 has 192 divisors, whose sum is σ = 64217966400. Its totient is φ = 4877383680.

The previous prime is 18319085273. The next prime is 18319085297. The reversal of 18319085280 is 8258091381.

It is a happy number.

18319085280 is a `hidden beast` number, since 1 + 8 + 31 + 90 + 8 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3059890 + ... + 3065870.

It is an arithmetic number, because the mean of its divisors is an integer number (334468575).

Almost surely, 2^18319085280 is an apocalyptic number.

18319085280 is a gapful number since it is divisible by the number (10) 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 18319085280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32108983200).

18319085280 is an abundant number, since it is smaller than the sum of its proper divisors (45898881120).

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

18319085280 is a wasteful number, since it uses less digits than its factorization.

18319085280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714 (or 6700 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18319085280 in words is "eighteen billion, three hundred nineteen million, eighty-five thousand, two hundred eighty".