18481623 has 8 divisors (see below), whose sum is σ = 25939200. Its totient is φ = 11672568.

The previous prime is 18481621. The next prime is 18481637. The reversal of 18481623 is 32618481.

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

It is not a de Polignac number, because 18481623 - 2¹ = 18481621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18481621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162063 + ... + 162176.

It is an arithmetic number, because the mean of its divisors is an integer number (3242400).

Almost surely, 2^18481623 is an apocalyptic number.

18481623 is a deficient number, since it is larger than the sum of its proper divisors (7457577).

18481623 is a wasteful number, since it uses less digits than its factorization.

18481623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324261.

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

The square root of 18481623 is about 4299.0258198806. The cubic root of 18481623 is about 264.3910212222.

The spelling of 18481623 in words is "eighteen million, four hundred eighty-one thousand, six hundred twenty-three".