12345681732 has 24 divisors (see below), whose sum is σ = 28818972000. Its totient is φ = 4113458496.

The previous prime is 12345681683. The next prime is 12345681739. The reversal of 12345681732 is 23718654321.

It is not an unprimeable number, because it can be changed into a prime (12345681739) 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 7 ways as a sum of consecutive naturals, for example, 191857 + ... + 247992.

It is an arithmetic number, because the mean of its divisors is an integer number (1200790500).

Almost surely, 2^12345681732 is an apocalyptic number.

12345681732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12345681732 is an abundant number, since it is smaller than the sum of its proper divisors (16473290268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12345681732 is a wasteful number, since it uses less digits than its factorization.

12345681732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442195 (or 442193 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The spelling of 12345681732 in words is "twelve billion, three hundred forty-five million, six hundred eighty-one thousand, seven hundred thirty-two".