18227493 has 24 divisors (see below), whose sum is σ = 27570816. Its totient is φ = 11592000.

The previous prime is 18227491. The next prime is 18227497. The reversal of 18227493 is 39472281.

It is not a de Polignac number, because 18227493 - 2¹ = 18227491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16818 + ... + 17868.

It is an arithmetic number, because the mean of its divisors is an integer number (1148784).

Almost surely, 2^18227493 is an apocalyptic number.

It is an amenable number.

18227493 is a deficient number, since it is larger than the sum of its proper divisors (9343323).

18227493 is a wasteful number, since it uses less digits than its factorization.

18227493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1142 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18227493 is about 4269.3668148802. The cubic root of 18227493 is about 263.1735951945.

The spelling of 18227493 in words is "eighteen million, two hundred twenty-seven thousand, four hundred ninety-three".