18237455216 has 80 divisors (see below), whose sum is σ = 37728537600. Its totient is φ = 8515632384.

The previous prime is 18237455213. The next prime is 18237455233. The reversal of 18237455216 is 61255473281.

Its product of digits (403200) is a multiple of the sum of its prime divisors (2800).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18237455213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7482350 + ... + 7484786.

It is an arithmetic number, because the mean of its divisors is an integer number (471606720).

Almost surely, 2^18237455216 is an apocalyptic number.

18237455216 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 18237455216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18864268800).

18237455216 is an abundant number, since it is smaller than the sum of its proper divisors (19491082384).

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

18237455216 is a wasteful number, since it uses less digits than its factorization.

18237455216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806 (or 2800 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The spelling of 18237455216 in words is "eighteen billion, two hundred thirty-seven million, four hundred fifty-five thousand, two hundred sixteen".