18342513 has 18 divisors (see below), whose sum is σ = 30821154. Its totient is φ = 10481184.

The previous prime is 18342503. The next prime is 18342547. The reversal of 18342513 is 31524381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13198689 + 5143824 = 3633^2 + 2268^2 .

It is not a de Polignac number, because 18342513 - 2⁴ = 18342497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18342503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20356 + ... + 21237.

Almost surely, 2^18342513 is an apocalyptic number.

It is an amenable number.

18342513 is a deficient number, since it is larger than the sum of its proper divisors (12478641).

18342513 is a wasteful number, since it uses less digits than its factorization.

18342513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41613 (or 41603 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 18342513 is about 4282.8160128588. The cubic root of 18342513 is about 263.7259984298.

Adding to 18342513 its reverse (31524381), we get a palindrome (49866894).

The spelling of 18342513 in words is "eighteen million, three hundred forty-two thousand, five hundred thirteen".