12309818450 has 48 divisors (see below), whose sum is σ = 23246845440. Its totient is φ = 4848750720.

The previous prime is 12309818447. The next prime is 12309818453. The reversal of 12309818450 is 5481890321.

It is an interprime number because it is at equal distance from previous prime (12309818447) and next prime (12309818453).

It is a junction number, because it is equal to n+sod(n) for n = 12309818398 and 12309818407.

It is not an unprimeable number, because it can be changed into a prime (12309818453) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2651231 + ... + 2655869.

It is an arithmetic number, because the mean of its divisors is an integer number (484309280).

Almost surely, 2^12309818450 is an apocalyptic number.

12309818450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12309818450 is a deficient number, since it is larger than the sum of its proper divisors (10937026990).

12309818450 is a wasteful number, since it uses less digits than its factorization.

12309818450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451 (or 5446 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 12309818450 in words is "twelve billion, three hundred nine million, eight hundred eighteen thousand, four hundred fifty".