21755527226 has 16 divisors (see below), whose sum is σ = 34476848640. Its totient is φ = 10279206000.

The previous prime is 21755527219. The next prime is 21755527243. The reversal of 21755527226 is 62272555712.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3987650 + ... + 3993101.

It is an arithmetic number, because the mean of its divisors is an integer number (2154803040).

Almost surely, 2^21755527226 is an apocalyptic number.

21755527226 is a deficient number, since it is larger than the sum of its proper divisors (12721321414).

21755527226 is a wasteful number, since it uses less digits than its factorization.

21755527226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980829.

The product of its digits is 588000, while the sum is 44.

The spelling of 21755527226 in words is "twenty-one billion, seven hundred fifty-five million, five hundred twenty-seven thousand, two hundred twenty-six".