18282631 has 8 divisors (see below), whose sum is σ = 19340640. Its totient is φ = 17246592.

The previous prime is 18282623. The next prime is 18282661. The reversal of 18282631 is 13628281.

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 18282631 - 2³ = 18282623 is a prime.

It is a super-3 number, since 3×18282631³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18282593 and 18282602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18282661) 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, 3766 + ... + 7123.

It is an arithmetic number, because the mean of its divisors is an integer number (2417580).

Almost surely, 2^18282631 is an apocalyptic number.

18282631 is a deficient number, since it is larger than the sum of its proper divisors (1058009).

18282631 is a wasteful number, since it uses less digits than its factorization.

18282631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985.

The product of its digits is 4608, while the sum is 31.

The square root of 18282631 is about 4275.8193366886. The cubic root of 18282631 is about 263.4386939748.

The spelling of 18282631 in words is "eighteen million, two hundred eighty-two thousand, six hundred thirty-one".