18124013 has 4 divisors (see below), whose sum is σ = 18139968. Its totient is φ = 18108060.

The previous prime is 18123991. The next prime is 18124019. The reversal of 18124013 is 31042181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18124013 - 2¹⁰ = 18122989 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 (18124019) 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, 6131 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (4534992).

Almost surely, 2^18124013 is an apocalyptic number.

It is an amenable number.

18124013 is a deficient number, since it is larger than the sum of its proper divisors (15955).

18124013 is a wasteful number, since it uses less digits than its factorization.

18124013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15954.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18124013 is about 4257.2306726322. The cubic root of 18124013 is about 262.6746254542.

Adding to 18124013 its reverse (31042181), we get a palindrome (49166194).

The spelling of 18124013 in words is "eighteen million, one hundred twenty-four thousand, thirteen".