12420332032 has 80 divisors (see below), whose sum is σ = 25677856512. Its totient is φ = 5995560960.

The previous prime is 12420332021. The next prime is 12420332083. The reversal of 12420332032 is 23023302421.

It is a junction number, because it is equal to n+sod(n) for n = 12420331994 and 12420332012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10205088 + ... + 10206304.

Almost surely, 2^12420332032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12420332032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12838928256).

12420332032 is an abundant number, since it is smaller than the sum of its proper divisors (13257524480).

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

12420332032 is an equidigital number, since it uses as much as digits as its factorization.

12420332032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 12420332032 its reverse (23023302421), we get a palindrome (35443634453).

The spelling of 12420332032 in words is "twelve billion, four hundred twenty million, three hundred thirty-two thousand, thirty-two".