12393889020 has 144 divisors (see below), whose sum is σ = 39671311680. Its totient is φ = 3125726208.

The previous prime is 12393888971. The next prime is 12393889037. The reversal of 12393889020 is 2098839321.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 351642 + ... + 385278.

It is an arithmetic number, because the mean of its divisors is an integer number (275495220).

Almost surely, 2^12393889020 is an apocalyptic number.

12393889020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12393889020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19835655840).

12393889020 is an abundant number, since it is smaller than the sum of its proper divisors (27277422660).

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

12393889020 is a wasteful number, since it uses less digits than its factorization.

12393889020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33764 (or 33759 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 12393889020 in words is "twelve billion, three hundred ninety-three million, eight hundred eighty-nine thousand, twenty".