20023345646749 has 2 divisors, whose sum is σ = 20023345646750. Its totient is φ = 20023345646748.

The previous prime is 20023345646701. The next prime is 20023345646797. The reversal of 20023345646749 is 94764654332002.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20023345646701) and next prime (20023345646797).

It can be written as a sum of positive squares in only one way, i.e., 19844289724249 + 179055922500 = 4454693^2 + 423150^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023345646749 - 2⁷ = 20023345646621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20023345646749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20023345641749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011672823374 + 10011672823375.

It is an arithmetic number, because the mean of its divisors is an integer number (10011672823375).

Almost surely, 2^{20023345646749} is an apocalyptic number.

It is an amenable number.

20023345646749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023345646749 is an equidigital number, since it uses as much as digits as its factorization.

20023345646749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 55.

The spelling of 20023345646749 in words is "twenty trillion, twenty-three billion, three hundred forty-five million, six hundred forty-six thousand, seven hundred forty-nine".