18336718415 has 64 divisors (see below), whose sum is σ = 24791132160. Its totient is φ = 12953364480.

The previous prime is 18336718399. The next prime is 18336718423. The reversal of 18336718415 is 51481763381.

It is not a de Polignac number, because 18336718415 - 2⁴ = 18336718399 is a prime.

It is a super-4 number, since 4×18336718415⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 18336718415.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 18883880 + ... + 18884850.

It is an arithmetic number, because the mean of its divisors is an integer number (387361440).

Almost surely, 2^18336718415 is an apocalyptic number.

18336718415 is a deficient number, since it is larger than the sum of its proper divisors (6454413745).

18336718415 is a wasteful number, since it uses less digits than its factorization.

18336718415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 483840, while the sum is 47.

The spelling of 18336718415 in words is "eighteen billion, three hundred thirty-six million, seven hundred eighteen thousand, four hundred fifteen".