18168267264 has 80 divisors (see below), whose sum is σ = 55315917888. Its totient is φ = 5190930432.

The previous prime is 18168267239. The next prime is 18168267269. The reversal of 18168267264 is 46276286181.

It is a super-2 number, since 2×18168267264² (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 not an unprimeable number, because it can be changed into a prime (18168267269) 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, 834127 + ... + 855630.

Almost surely, 2^18168267264 is an apocalyptic number.

18168267264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18168267264 is an abundant number, since it is smaller than the sum of its proper divisors (37147650624).

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

18168267264 is an equidigital number, since it uses as much as digits as its factorization.

18168267264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689785 (or 1689769 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The spelling of 18168267264 in words is "eighteen billion, one hundred sixty-eight million, two hundred sixty-seven thousand, two hundred sixty-four".