21222540626 has 48 divisors (see below), whose sum is σ = 37386751896. Its totient is φ = 9008423424.

The previous prime is 21222540601. The next prime is 21222540659. The reversal of 21222540626 is 62604522212.

It can be written as a sum of positive squares in 4 ways, for example, as 13203159025 + 8019381601 = 114905^2 + 89551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21222540592 and 21222540601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5183036 + ... + 5187128.

Almost surely, 2^21222540626 is an apocalyptic number.

21222540626 is a deficient number, since it is larger than the sum of its proper divisors (16164211270).

21222540626 is a wasteful number, since it uses less digits than its factorization.

21222540626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4603 (or 4596 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 21222540626 in words is "twenty-one billion, two hundred twenty-two million, five hundred forty thousand, six hundred twenty-six".