18281838205 has 16 divisors (see below), whose sum is σ = 22046624640. Its totient is φ = 14553338688.

The previous prime is 18281838193. The next prime is 18281838217. The reversal of 18281838205 is 50283818281.

It is an interprime number because it is at equal distance from previous prime (18281838193) and next prime (18281838217).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18281838205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042651 + ... + 1060039.

It is an arithmetic number, because the mean of its divisors is an integer number (1377914040).

Almost surely, 2^18281838205 is an apocalyptic number.

It is an amenable number.

18281838205 is a deficient number, since it is larger than the sum of its proper divisors (3764786435).

18281838205 is a wasteful number, since it uses less digits than its factorization.

18281838205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18420.

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 18281838205 in words is "eighteen billion, two hundred eighty-one million, eight hundred thirty-eight thousand, two hundred five".