21073008637705 has 8 divisors (see below), whose sum is σ = 25288038460800. Its totient is φ = 16858121513136.

The previous prime is 21073008637669. The next prime is 21073008637739. The reversal of 21073008637705 is 50773680037012.

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 21073008637705 - 2³³ = 21064418703113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35349475 + ... + 35940664.

It is an arithmetic number, because the mean of its divisors is an integer number (3161004807600).

Almost surely, 2^{21073008637705} is an apocalyptic number.

It is an amenable number.

21073008637705 is a deficient number, since it is larger than the sum of its proper divisors (4215029823095).

21073008637705 is an equidigital number, since it uses as much as digits as its factorization.

21073008637705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71349263.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 21073008637705 in words is "twenty-one trillion, seventy-three billion, eight million, six hundred thirty-seven thousand, seven hundred five".