12138458205 has 32 divisors (see below), whose sum is σ = 19596769920. Its totient is φ = 6415683840.

The previous prime is 12138458203. The next prime is 12138458207. The reversal of 12138458205 is 50285483121.

It is an interprime number because it is at equal distance from previous prime (12138458203) and next prime (12138458207).

It is not a de Polignac number, because 12138458205 - 2¹ = 12138458203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138458203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787866 + ... + 803124.

It is an arithmetic number, because the mean of its divisors is an integer number (612399060).

Almost surely, 2^12138458205 is an apocalyptic number.

12138458205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12138458205 is a deficient number, since it is larger than the sum of its proper divisors (7458311715).

12138458205 is a wasteful number, since it uses less digits than its factorization.

12138458205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15741.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 12138458205 in words is "twelve billion, one hundred thirty-eight million, four hundred fifty-eight thousand, two hundred five".