21246115330 has 72 divisors (see below), whose sum is σ = 44654578164. Its totient is φ = 7271278080.

The previous prime is 21246115259. The next prime is 21246115339. The reversal of 21246115330 is 3351164212.

It can be written as a sum of positive squares in 6 ways, for example, as 15916093281 + 5330022049 = 126159^2 + 73007^2 .

It is a super-2 number, since 2×21246115330² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21246115339) 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 35 ways as a sum of consecutive naturals, for example, 319312 + ... + 380068.

Almost surely, 2^21246115330 is an apocalyptic number.

21246115330 is an abundant number, since it is smaller than the sum of its proper divisors (23408462834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21246115330 is a wasteful number, since it uses less digits than its factorization.

21246115330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60820 (or 60792 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21246115330 its reverse (3351164212), we get a palindrome (24597279542).

The spelling of 21246115330 in words is "twenty-one billion, two hundred forty-six million, one hundred fifteen thousand, three hundred thirty".