20344643650451 has 8 divisors (see below), whose sum is σ = 20693889274800. Its totient is φ = 19998296330400.

The previous prime is 20344643650421. The next prime is 20344643650481. The reversal of 20344643650451 is 15405634644302.

It is an interprime number because it is at equal distance from previous prime (20344643650421) and next prime (20344643650481).

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

It is a cyclic number.

It is not a de Polignac number, because 20344643650451 - 2²⁶ = 20344576541587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20344643650396 and 20344643650405.

It is not an unprimeable number, because it can be changed into a prime (20344643650421) 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 7 ways as a sum of consecutive naturals, for example, 724561916 + ... + 724589993.

It is an arithmetic number, because the mean of its divisors is an integer number (2586736159350).

Almost surely, 2^{20344643650451} is an apocalyptic number.

20344643650451 is a deficient number, since it is larger than the sum of its proper divisors (349245624349).

20344643650451 is a wasteful number, since it uses less digits than its factorization.

20344643650451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449152149.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 20344643650451 in words is "twenty trillion, three hundred forty-four billion, six hundred forty-three million, six hundred fifty thousand, four hundred fifty-one".