18334513 has 4 divisors (see below), whose sum is σ = 18349888. Its totient is φ = 18319140.

The previous prime is 18334453. The next prime is 18334531. The reversal of 18334513 is 31543381.

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 18334513 - 2¹⁷ = 18203441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18334553) 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, 5733 + ... + 8338.

It is an arithmetic number, because the mean of its divisors is an integer number (4587472).

Almost surely, 2^18334513 is an apocalyptic number.

It is an amenable number.

18334513 is a deficient number, since it is larger than the sum of its proper divisors (15375).

18334513 is a wasteful number, since it uses less digits than its factorization.

18334513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15374.

The product of its digits is 4320, while the sum is 28.

The square root of 18334513 is about 4281.8819460606. The cubic root of 18334513 is about 263.6876519068.

Adding to 18334513 its reverse (31543381), we get a palindrome (49877894).

The spelling of 18334513 in words is "eighteen million, three hundred thirty-four thousand, five hundred thirteen".