21050445266 has 16 divisors (see below), whose sum is σ = 31687891200. Its totient is φ = 10487881488.

The previous prime is 21050445257. The next prime is 21050445271. The reversal of 21050445266 is 66254405012.

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, 638495 + ... + 670653.

It is an arithmetic number, because the mean of its divisors is an integer number (1980493200).

Almost surely, 2^21050445266 is an apocalyptic number.

21050445266 is a deficient number, since it is larger than the sum of its proper divisors (10637445934).

21050445266 is a wasteful number, since it uses less digits than its factorization.

21050445266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 21050445266 in words is "twenty-one billion, fifty million, four hundred forty-five thousand, two hundred sixty-six".