20444350253643 has 48 divisors (see below), whose sum is σ = 29937477473280. Its totient is φ = 13442226265728.

The previous prime is 20444350253603. The next prime is 20444350253669. The reversal of 20444350253643 is 34635205344402.

20444350253643 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 4 + 350 + 253 + 6 + 43 = 666.

It is not a de Polignac number, because 20444350253643 - 2²⁰ = 20444349205067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20444350253603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3449355946 + ... + 3449361872.

It is an arithmetic number, because the mean of its divisors is an integer number (623697447360).

Almost surely, 2^{20444350253643} is an apocalyptic number.

20444350253643 is a deficient number, since it is larger than the sum of its proper divisors (9493127219637).

20444350253643 is a wasteful number, since it uses less digits than its factorization.

20444350253643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10536 (or 10533 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 45.

The spelling of 20444350253643 in words is "twenty trillion, four hundred forty-four billion, three hundred fifty million, two hundred fifty-three thousand, six hundred forty-three".