21621344111706 has 32 divisors (see below), whose sum is σ = 43658053686720. Its totient is φ = 7137921782016.

The previous prime is 21621344111701. The next prime is 21621344111707. The reversal of 21621344111706 is 60711144312612.

It is not an unprimeable number, because it can be changed into a prime (21621344111701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1833181 + ... + 6826656.

It is an arithmetic number, because the mean of its divisors is an integer number (1364314177710).

Almost surely, 2^{21621344111706} is an apocalyptic number.

21621344111706 is an abundant number, since it is smaller than the sum of its proper divisors (22036709575014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21621344111706 is a wasteful number, since it uses less digits than its factorization.

21621344111706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663838.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 21621344111706 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred forty-four million, one hundred eleven thousand, seven hundred six".