18242638513 has 8 divisors (see below), whose sum is σ = 19940630976. Its totient is φ = 16551241200.

The previous prime is 18242638507. The next prime is 18242638537. The reversal of 18242638513 is 31583624281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18242638513 - 2¹³ = 18242630321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18242638513.

It is not an unprimeable number, because it can be changed into a prime (18242668513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642998 + ... + 1654063.

It is an arithmetic number, because the mean of its divisors is an integer number (2492578872).

Almost surely, 2^18242638513 is an apocalyptic number.

It is an amenable number.

18242638513 is a deficient number, since it is larger than the sum of its proper divisors (1697992463).

18242638513 is a wasteful number, since it uses less digits than its factorization.

18242638513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297575.

The product of its digits is 276480, while the sum is 43.

The spelling of 18242638513 in words is "eighteen billion, two hundred forty-two million, six hundred thirty-eight thousand, five hundred thirteen".