20344133550643 has 8 divisors (see below), whose sum is σ = 23263948199520. Its totient is φ = 17427696365760.

The previous prime is 20344133550613. The next prime is 20344133550659. The reversal of 20344133550643 is 34605533144302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344133550643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20344133550643.

It is not an unprimeable number, because it can be changed into a prime (20344133550613) 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 7 ways as a sum of consecutive naturals, for example, 844353088 + ... + 844377181.

It is an arithmetic number, because the mean of its divisors is an integer number (2907993524940).

Almost surely, 2^{20344133550643} is an apocalyptic number.

20344133550643 is a deficient number, since it is larger than the sum of its proper divisors (2919814648877).

20344133550643 is a wasteful number, since it uses less digits than its factorization.

20344133550643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688731997.

The product of its (nonzero) digits is 1555200, while the sum is 43.

Adding to 20344133550643 its reverse (34605533144302), we get a palindrome (54949666694945).

The spelling of 20344133550643 in words is "twenty trillion, three hundred forty-four billion, one hundred thirty-three million, five hundred fifty thousand, six hundred forty-three".