21303001250 has 40 divisors (see below), whose sum is σ = 41307324300. Its totient is φ = 8227352000.

The previous prime is 21303001249. The next prime is 21303001253. The reversal of 21303001250 is 5210030312.

It can be written as a sum of positive squares in 10 ways, for example, as 4310053801 + 16992947449 = 65651^2 + 130357^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21303001253) 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 19 ways as a sum of consecutive naturals, for example, 257585 + ... + 330084.

Almost surely, 2^21303001250 is an apocalyptic number.

21303001250 is a deficient number, since it is larger than the sum of its proper divisors (20004323050).

21303001250 is an equidigital number, since it uses as much as digits as its factorization.

21303001250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587720 (or 587705 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 21303001250 its reverse (5210030312), we get a palindrome (26513031562).

The spelling of 21303001250 in words is "twenty-one billion, three hundred three million, one thousand, two hundred fifty".