18083643812 has 12 divisors (see below), whose sum is σ = 34080713436. Its totient is φ = 8346297120.

The previous prime is 18083643811. The next prime is 18083643817. The reversal of 18083643812 is 21834638081.

It can be written as a sum of positive squares in 2 ways, for example, as 2844728896 + 15238914916 = 53336^2 + 123446^2 .

It is not an unprimeable number, because it can be changed into a prime (18083643811) 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, 173881139 + ... + 173881242.

It is an arithmetic number, because the mean of its divisors is an integer number (2840059453).

Almost surely, 2^18083643812 is an apocalyptic number.

It is an amenable number.

18083643812 is a deficient number, since it is larger than the sum of its proper divisors (15997069624).

18083643812 is a wasteful number, since it uses less digits than its factorization.

18083643812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347762398 (or 347762396 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 18083643812 in words is "eighteen billion, eighty-three million, six hundred forty-three thousand, eight hundred twelve".