18658912205 has 16 divisors (see below), whose sum is σ = 22762228608. Its totient is φ = 14681400000.

The previous prime is 18658912189. The next prime is 18658912231. The reversal of 18658912205 is 50221985681.

It is not a de Polignac number, because 18658912205 - 2⁴ = 18658912189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18658912205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46091 + ... + 198600.

It is an arithmetic number, because the mean of its divisors is an integer number (1422639288).

Almost surely, 2^18658912205 is an apocalyptic number.

It is an amenable number.

18658912205 is a deficient number, since it is larger than the sum of its proper divisors (4103316403).

18658912205 is a wasteful number, since it uses less digits than its factorization.

18658912205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244948.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 18658912205 in words is "eighteen billion, six hundred fifty-eight million, nine hundred twelve thousand, two hundred five".