18913216000 has 480 divisors, whose sum is σ = 56689487712. Its totient is φ = 6270566400.

The previous prime is 18913215983. The next prime is 18913216061. The reversal of 18913216000 is 61231981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116031919 + ... + 116032081.

Almost surely, 2^18913216000 is an apocalyptic number.

18913216000 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 18913216000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28344743856).

18913216000 is an abundant number, since it is smaller than the sum of its proper divisors (37776271712).

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

18913216000 is an equidigital number, since it uses as much as digits as its factorization.

18913216000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

Adding to 18913216000 its reverse (61231981), we get a palindrome (18974447981).

The spelling of 18913216000 in words is "eighteen billion, nine hundred thirteen million, two hundred sixteen thousand".