18235362816 has 400 divisors, whose sum is σ = 60318960768. Its totient is φ = 5438361600.

The previous prime is 18235362799. The next prime is 18235362823. The reversal of 18235362816 is 61826353281.

18235362816 is a `hidden beast` number, since 1 + 8 + 2 + 3 + 5 + 3 + 628 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32389351 + ... + 32389913.

Almost surely, 2^18235362816 is an apocalyptic number.

18235362816 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 18235362816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30159480384).

18235362816 is an abundant number, since it is smaller than the sum of its proper divisors (42083597952).

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

18235362816 is an equidigital number, since it uses as much as digits as its factorization.

18235362816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 650 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 18235362816 in words is "eighteen billion, two hundred thirty-five million, three hundred sixty-two thousand, eight hundred sixteen".