21343215050 has 24 divisors (see below), whose sum is σ = 40771312716. Its totient is φ = 8306547840.

The previous prime is 21343214983. The next prime is 21343215053. The reversal of 21343215050 is 5051234312.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13072949569 + 8270265481 = 114337^2 + 90941^2 .

It is not an unprimeable number, because it can be changed into a prime (21343215053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5766587 + ... + 5770286.

Almost surely, 2^21343215050 is an apocalyptic number.

21343215050 is a deficient number, since it is larger than the sum of its proper divisors (19428097666).

21343215050 is a wasteful number, since it uses less digits than its factorization.

21343215050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11536922 (or 11536917 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 21343215050 its reverse (5051234312), we get a palindrome (26394449362).

The spelling of 21343215050 in words is "twenty-one billion, three hundred forty-three million, two hundred fifteen thousand, fifty".