18333536868 has 24 divisors (see below), whose sum is σ = 47531392160. Its totient is φ = 6111178920.

The previous prime is 18333536861. The next prime is 18333536909. The reversal of 18333536868 is 86863533381.

It is a happy number.

18333536868 is a `hidden beast` number, since 18 + 3 + 33 + 536 + 8 + 68 = 666.

It is a super-2 number, since 2×18333536868² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18333536861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84877378 + ... + 84877593.

Almost surely, 2^18333536868 is an apocalyptic number.

18333536868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18333536868 is an abundant number, since it is smaller than the sum of its proper divisors (29197855292).

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

18333536868 is a wasteful number, since it uses less digits than its factorization.

18333536868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169754984 (or 169754976 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 18333536868 in words is "eighteen billion, three hundred thirty-three million, five hundred thirty-six thousand, eight hundred sixty-eight".