20442628744543 has 2 divisors, whose sum is σ = 20442628744544. Its totient is φ = 20442628744542.

The previous prime is 20442628744441. The next prime is 20442628744547. The reversal of 20442628744543 is 34544782624402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20442628744543 - 2²⁹ = 20442091873631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442628744547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221314372271 + 10221314372272.

It is an arithmetic number, because the mean of its divisors is an integer number (10221314372272).

Almost surely, 2^{20442628744543} is an apocalyptic number.

20442628744543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442628744543 is an equidigital number, since it uses as much as digits as its factorization.

20442628744543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41287680, while the sum is 55.

The spelling of 20442628744543 in words is "twenty trillion, four hundred forty-two billion, six hundred twenty-eight million, seven hundred forty-four thousand, five hundred forty-three".