18282185491 has 8 divisors (see below), whose sum is σ = 19267692480. Its totient is φ = 17299007208.

The previous prime is 18282185447. The next prime is 18282185507. The reversal of 18282185491 is 19458128281.

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

It is a cyclic number.

It is not a de Polignac number, because 18282185491 - 2¹⁵ = 18282152723 is a prime.

It is a super-2 number, since 2×18282185491² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18282185791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566041 + ... + 597466.

It is an arithmetic number, because the mean of its divisors is an integer number (2408461560).

Almost surely, 2^18282185491 is an apocalyptic number.

18282185491 is a deficient number, since it is larger than the sum of its proper divisors (985506989).

18282185491 is a wasteful number, since it uses less digits than its factorization.

18282185491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164353.

The product of its digits is 368640, while the sum is 49.

The spelling of 18282185491 in words is "eighteen billion, two hundred eighty-two million, one hundred eighty-five thousand, four hundred ninety-one".