12636820450 has 48 divisors (see below), whose sum is σ = 23628309120. Its totient is φ = 5028182720.

The previous prime is 12636820411. The next prime is 12636820457. The reversal of 12636820450 is 5402863621.

It is not an unprimeable number, because it can be changed into a prime (12636820457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12474144 + ... + 12475156.

It is an arithmetic number, because the mean of its divisors is an integer number (492256440).

Almost surely, 2^12636820450 is an apocalyptic number.

12636820450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12636820450 is a deficient number, since it is larger than the sum of its proper divisors (10991488670).

12636820450 is a wasteful number, since it uses less digits than its factorization.

12636820450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12636820450 in words is "twelve billion, six hundred thirty-six million, eight hundred twenty thousand, four hundred fifty".