18434237205 has 8 divisors (see below), whose sum is σ = 29494779552. Its totient is φ = 9831593168.

The previous prime is 18434237201. The next prime is 18434237257. The reversal of 18434237205 is 50273243481.

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 18434237205 - 2² = 18434237201 is a prime.

It is a super-2 number, since 2×18434237205² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434237201) 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 7 ways as a sum of consecutive naturals, for example, 614474559 + ... + 614474588.

It is an arithmetic number, because the mean of its divisors is an integer number (3686847444).

Almost surely, 2^18434237205 is an apocalyptic number.

18434237205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18434237205 is a deficient number, since it is larger than the sum of its proper divisors (11060542347).

18434237205 is a wasteful number, since it uses less digits than its factorization.

18434237205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228949155.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 18434237205 in words is "eighteen billion, four hundred thirty-four million, two hundred thirty-seven thousand, two hundred five".