21073008637739 has 2 divisors, whose sum is σ = 21073008637740. Its totient is φ = 21073008637738.

The previous prime is 21073008637669. The next prime is 21073008637789. The reversal of 21073008637739 is 93773680037012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21073008637739 - 2²⁰ = 21073007589163 is a prime.

It is not a weakly prime, because it can be changed into another prime (21073008637789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536504318869 + 10536504318870.

It is an arithmetic number, because the mean of its divisors is an integer number (10536504318870).

Almost surely, 2^{21073008637739} is an apocalyptic number.

21073008637739 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073008637739 is an equidigital number, since it uses as much as digits as its factorization.

21073008637739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8001504, while the sum is 56.

The spelling of 21073008637739 in words is "twenty-one trillion, seventy-three billion, eight million, six hundred thirty-seven thousand, seven hundred thirty-nine".