18227826 has 12 divisors (see below), whose sum is σ = 39493662. Its totient is φ = 6075936.

The previous prime is 18227809. The next prime is 18227831. The reversal of 18227826 is 62872281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17015625 + 1212201 = 4125^2 + 1101^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506311 + ... + 506346.

Almost surely, 2^18227826 is an apocalyptic number.

18227826 is an abundant number, since it is smaller than the sum of its proper divisors (21265836).

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

18227826 is a wasteful number, since it uses less digits than its factorization.

18227826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012665 (or 1012662 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18227826 is about 4269.4058134593. The cubic root of 18227826 is about 263.1751978335.

The spelling of 18227826 in words is "eighteen million, two hundred twenty-seven thousand, eight hundred twenty-six".