18043685219 has 16 divisors (see below), whose sum is σ = 21522004992. Its totient is φ = 14790782688.

The previous prime is 18043685213. The next prime is 18043685237. The reversal of 18043685219 is 91258634081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18043685219 - 2⁸ = 18043684963 is a prime.

It is a super-2 number, since 2×18043685219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18043685213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621037 + ... + 1632129.

It is an arithmetic number, because the mean of its divisors is an integer number (1345125312).

Almost surely, 2^18043685219 is an apocalyptic number.

18043685219 is a deficient number, since it is larger than the sum of its proper divisors (3478319773).

18043685219 is a wasteful number, since it uses less digits than its factorization.

18043685219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21226.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 18043685219 in words is "eighteen billion, forty-three million, six hundred eighty-five thousand, two hundred nineteen".