12020403017844 has 72 divisors (see below), whose sum is σ = 33745641659520. Its totient is φ = 3698585538336.

The previous prime is 12020403017773. The next prime is 12020403017897. The reversal of 12020403017844 is 44871030402021.

12020403017844 is a `hidden beast` number, since 1 + 20 + 20 + 403 + 0 + 178 + 44 = 666.

It is a super-2 number, since 2×12020403017844² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12020403017799 and 12020403017808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329271772 + ... + 329308275.

Almost surely, 2^{12020403017844} is an apocalyptic number.

It is an amenable number.

12020403017844 is an abundant number, since it is smaller than the sum of its proper divisors (21725238641676).

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

12020403017844 is a wasteful number, since it uses less digits than its factorization.

12020403017844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658580086 (or 658580065 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

Adding to 12020403017844 its reverse (44871030402021), we get a palindrome (56891433419865).

The spelling of 12020403017844 in words is "twelve trillion, twenty billion, four hundred three million, seventeen thousand, eight hundred forty-four".