20344002538780 has 12 divisors (see below), whose sum is σ = 42722405331480. Its totient is φ = 8137601015504.

The previous prime is 20344002538759. The next prime is 20344002538787. The reversal of 20344002538780 is 8783520044302.

It is a self number, because there is not a number n which added to its sum of digits gives 20344002538780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344002538787) 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 3 ways as a sum of consecutive naturals, for example, 508600063450 + ... + 508600063489.

It is an arithmetic number, because the mean of its divisors is an integer number (3560200444290).

Almost surely, 2^{20344002538780} is an apocalyptic number.

20344002538780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344002538780 is an abundant number, since it is smaller than the sum of its proper divisors (22378402792700).

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

20344002538780 is a wasteful number, since it uses less digits than its factorization.

20344002538780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017200126948 (or 1017200126946 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 20344002538780 in words is "twenty trillion, three hundred forty-four billion, two million, five hundred thirty-eight thousand, seven hundred eighty".