18296990208 has 560 divisors, whose sum is σ = 64404806400. Its totient is φ = 5082144768.

The previous prime is 18296990207. The next prime is 18296990237. The reversal of 18296990208 is 80209969281.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18296990207) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 122798518 + ... + 122798666.

Almost surely, 2^18296990208 is an apocalyptic number.

18296990208 is a gapful number since it is divisible by the number (18) 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 18296990208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32202403200).

18296990208 is an abundant number, since it is smaller than the sum of its proper divisors (46107816192).

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

18296990208 is an frugal number, since it uses more digits than its factorization.

18296990208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 18296990208 in words is "eighteen billion, two hundred ninety-six million, nine hundred ninety thousand, two hundred eight".