21709442386624 has 14 divisors (see below), whose sum is σ = 43079674736084. Its totient is φ = 10854721193280.

The previous prime is 21709442386609. The next prime is 21709442386747. The reversal of 21709442386624 is 42668324490712.

It is an unprimeable number.

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, 169605018582 + ... + 169605018709.

It is an arithmetic number, because the mean of its divisors is an integer number (3077119624006).

Almost surely, 2^{21709442386624} is an apocalyptic number.

It is an amenable number.

21709442386624 is a deficient number, since it is larger than the sum of its proper divisors (21370232349460).

21709442386624 is an equidigital number, since it uses as much as digits as its factorization.

21709442386624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339210037303 (or 339210037293 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 58.

The spelling of 21709442386624 in words is "twenty-one trillion, seven hundred nine billion, four hundred forty-two million, three hundred eighty-six thousand, six hundred twenty-four".