20104463612644 has 6 divisors (see below), whose sum is σ = 35182811322134. Its totient is φ = 10052231806320.

The previous prime is 20104463612641. The next prime is 20104463612663. The reversal of 20104463612644 is 44621636440102.

It can be written as a sum of positive squares in only one way, i.e., 18735825680100 + 1368637932544 = 4328490^2 + 1169888^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20104463612644.

It is not an unprimeable number, because it can be changed into a prime (20104463612641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513057951577 + ... + 2513057951584.

Almost surely, 2^{20104463612644} is an apocalyptic number.

It is an amenable number.

20104463612644 is a deficient number, since it is larger than the sum of its proper divisors (15078347709490).

20104463612644 is a wasteful number, since it uses less digits than its factorization.

20104463612644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026115903165 (or 5026115903163 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 20104463612644 in words is "twenty trillion, one hundred four billion, four hundred sixty-three million, six hundred twelve thousand, six hundred forty-four".