21338222650 has 72 divisors (see below), whose sum is σ = 42198577020. Its totient is φ = 8026110720.

The previous prime is 21338222597. The next prime is 21338222651. The reversal of 21338222650 is 5622283312.

It can be written as a sum of positive squares in 6 ways, for example, as 11618037369 + 9720185281 = 107787^2 + 98591^2 .

It is not an unprimeable number, because it can be changed into a prime (21338222651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2468536 + ... + 2477164.

Almost surely, 2^21338222650 is an apocalyptic number.

21338222650 is a deficient number, since it is larger than the sum of its proper divisors (20860354370).

21338222650 is a wasteful number, since it uses less digits than its factorization.

21338222650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816 (or 8792 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 21338222650 in words is "twenty-one billion, three hundred thirty-eight million, two hundred twenty-two thousand, six hundred fifty".