18124279 has 4 divisors (see below), whose sum is σ = 18135880. Its totient is φ = 18112680.

The previous prime is 18124277. The next prime is 18124289. The reversal of 18124279 is 97242181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97242181 = 4481 ⋅21701.

It is a cyclic number.

It is not a de Polignac number, because 18124279 - 2¹ = 18124277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18124273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3009 + ... + 6730.

It is an arithmetic number, because the mean of its divisors is an integer number (4533970).

Almost surely, 2^18124279 is an apocalyptic number.

18124279 is a deficient number, since it is larger than the sum of its proper divisors (11601).

18124279 is an equidigital number, since it uses as much as digits as its factorization.

18124279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11600.

The product of its digits is 8064, while the sum is 34.

The square root of 18124279 is about 4257.2619134838. The cubic root of 18124279 is about 262.6759105101.

The spelling of 18124279 in words is "eighteen million, one hundred twenty-four thousand, two hundred seventy-nine".