21522226436 has 12 divisors (see below), whose sum is σ = 37677164112. Its totient is φ = 10757322408.

The previous prime is 21522226433. The next prime is 21522226483. The reversal of 21522226436 is 63462222512.

It is a junction number, because it is equal to n+sod(n) for n = 21522226396 and 21522226405.

It is not an unprimeable number, because it can be changed into a prime (21522226433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 934910 + ... + 957653.

It is an arithmetic number, because the mean of its divisors is an integer number (3139763676).

Almost surely, 2^21522226436 is an apocalyptic number.

It is an amenable number.

21522226436 is a deficient number, since it is larger than the sum of its proper divisors (16154937676).

21522226436 is a wasteful number, since it uses less digits than its factorization.

21522226436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895410 (or 1895408 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

Adding to 21522226436 its reverse (63462222512), we get a palindrome (84984448948).

The spelling of 21522226436 in words is "twenty-one billion, five hundred twenty-two million, two hundred twenty-six thousand, four hundred thirty-six".