18243827 has 8 divisors (see below), whose sum is σ = 21276000. Its totient is φ = 15637272.

The previous prime is 18243793. The next prime is 18243829. The reversal of 18243827 is 72834281.

It is not a de Polignac number, because 18243827 - 2¹⁰ = 18242803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18243829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26252 + ... + 26937.

It is an arithmetic number, because the mean of its divisors is an integer number (2659500).

Almost surely, 2^18243827 is an apocalyptic number.

18243827 is a deficient number, since it is larger than the sum of its proper divisors (3032173).

18243827 is an frugal number, since it uses more digits than its factorization.

18243827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53210 (or 53196 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 18243827 is about 4271.2793165514. The cubic root of 18243827 is about 263.2521833306.

The spelling of 18243827 in words is "eighteen million, two hundred forty-three thousand, eight hundred twenty-seven".