18318490290 has 96 divisors (see below), whose sum is σ = 47939973120. Its totient is φ = 4853046528.

The previous prime is 18318490261. The next prime is 18318490297. The reversal of 18318490290 is 9209481381.

18318490290 is a `hidden beast` number, since 1 + 8 + 318 + 49 + 0 + 290 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (18318490297) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14321871 + ... + 14323149.

It is an arithmetic number, because the mean of its divisors is an integer number (499374720).

Almost surely, 2^18318490290 is an apocalyptic number.

18318490290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18318490290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23969986560).

18318490290 is an abundant number, since it is smaller than the sum of its proper divisors (29621482830).

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

18318490290 is a wasteful number, since it uses less digits than its factorization.

18318490290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 18318490290 in words is "eighteen billion, three hundred eighteen million, four hundred ninety thousand, two hundred ninety".