18190905216 has 512 divisors, whose sum is σ = 59927040000. Its totient is φ = 4817387520.

The previous prime is 18190905209. The next prime is 18190905247. The reversal of 18190905216 is 61250909181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91411485 + ... + 91411683.

It is an arithmetic number, because the mean of its divisors is an integer number (117045000).

Almost surely, 2^18190905216 is an apocalyptic number.

18190905216 is a gapful number since it is divisible by the number (16) 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 18190905216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29963520000).

18190905216 is an abundant number, since it is smaller than the sum of its proper divisors (41736134784).

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

18190905216 is a wasteful number, since it uses less digits than its factorization.

18190905216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 18190905216 in words is "eighteen billion, one hundred ninety million, nine hundred five thousand, two hundred sixteen".