18264381 has 8 divisors (see below), whose sum is σ = 24686400. Its totient is φ = 12009312.

The previous prime is 18264361. The next prime is 18264397. The reversal of 18264381 is 18346281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18264381 - 2⁵ = 18264349 is a prime.

It is a super-2 number, since 2×18264381² = 667175226626322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18264361) 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, 41481 + ... + 41918.

It is an arithmetic number, because the mean of its divisors is an integer number (3085800).

Almost surely, 2^18264381 is an apocalyptic number.

It is an amenable number.

18264381 is a deficient number, since it is larger than the sum of its proper divisors (6422019).

18264381 is an equidigital number, since it uses as much as digits as its factorization.

18264381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83475.

The product of its digits is 9216, while the sum is 33.

The square root of 18264381 is about 4273.6847099429. The cubic root of 18264381 is about 263.3510086233.

The spelling of 18264381 in words is "eighteen million, two hundred sixty-four thousand, three hundred eighty-one".