18281826 has 24 divisors (see below), whose sum is σ = 41333760. Its totient is φ = 5828856.

The previous prime is 18281801. The next prime is 18281831. The reversal of 18281826 is 62818281.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 21666 + ... + 22493.

It is an arithmetic number, because the mean of its divisors is an integer number (1722240).

Almost surely, 2^18281826 is an apocalyptic number.

18281826 is an abundant number, since it is smaller than the sum of its proper divisors (23051934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18281826 is a wasteful number, since it uses less digits than its factorization.

18281826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44190 (or 44187 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 18281826 is about 4275.7252016471. The cubic root of 18281826 is about 263.4348274405.

The spelling of 18281826 in words is "eighteen million, two hundred eighty-one thousand, eight hundred twenty-six".