12505741918 has 4 divisors (see below), whose sum is σ = 18758612880. Its totient is φ = 6252870958.

The previous prime is 12505741903. The next prime is 12505741921. The reversal of 12505741918 is 81914750521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81914750521 = 19 ⋅4311302659.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3126435478 + ... + 3126435481.

It is an arithmetic number, because the mean of its divisors is an integer number (4689653220).

Almost surely, 2^12505741918 is an apocalyptic number.

12505741918 is a deficient number, since it is larger than the sum of its proper divisors (6252870962).

12505741918 is an equidigital number, since it uses as much as digits as its factorization.

12505741918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252870961.

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 12505741918 in words is "twelve billion, five hundred five million, seven hundred forty-one thousand, nine hundred eighteen".