18263931336 has 192 divisors, whose sum is σ = 59597366400. Its totient is φ = 4936080384.

The previous prime is 18263931253. The next prime is 18263931337. The reversal of 18263931336 is 63313936281.

18263931336 is a `hidden beast` number, since 1 + 8 + 2 + 639 + 3 + 1 + 3 + 3 + 6 = 666.

It is a super-2 number, since 2×18263931336² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18263931291 and 18263931300.

It is not an unprimeable number, because it can be changed into a prime (18263931337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9546316 + ... + 9548228.

It is an arithmetic number, because the mean of its divisors is an integer number (310402950).

Almost surely, 2^18263931336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18263931336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29798683200).

18263931336 is an abundant number, since it is smaller than the sum of its proper divisors (41333435064).

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

18263931336 is a wasteful number, since it uses less digits than its factorization.

18263931336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948 (or 2941 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The spelling of 18263931336 in words is "eighteen billion, two hundred sixty-three million, nine hundred thirty-one thousand, three hundred thirty-six".