18268631 has 8 divisors (see below), whose sum is σ = 18533760. Its totient is φ = 18005688.

The previous prime is 18268619. The next prime is 18268643. The reversal of 18268631 is 13686281.

It is an interprime number because it is at equal distance from previous prime (18268619) and next prime (18268643).

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 18268631 - 2⁶ = 18268567 is a prime.

It is a super-2 number, since 2×18268631² = 667485757228322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18268591 and 18268600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268661) 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, 22820 + ... + 23606.

It is an arithmetic number, because the mean of its divisors is an integer number (2316720).

Almost surely, 2^18268631 is an apocalyptic number.

18268631 is a deficient number, since it is larger than the sum of its proper divisors (265129).

18268631 is a wasteful number, since it uses less digits than its factorization.

18268631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093.

The product of its digits is 13824, while the sum is 35.

The square root of 18268631 is about 4274.1819100268. The cubic root of 18268631 is about 263.3714337152.

The spelling of 18268631 in words is "eighteen million, two hundred sixty-eight thousand, six hundred thirty-one".