21303483 has 4 divisors (see below), whose sum is σ = 28404648. Its totient is φ = 14202320.

The previous prime is 21303481. The next prime is 21303511. The reversal of 21303483 is 38430312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21303483 - 2¹ = 21303481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550578 + ... + 3550583.

It is an arithmetic number, because the mean of its divisors is an integer number (7101162).

Almost surely, 2^21303483 is an apocalyptic number.

21303483 is a deficient number, since it is larger than the sum of its proper divisors (7101165).

21303483 is an equidigital number, since it uses as much as digits as its factorization.

21303483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101164.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21303483 is about 4615.5696289841. The cubic root of 21303483 is about 277.2150927026.

Adding to 21303483 its reverse (38430312), we get a palindrome (59733795).

The spelling of 21303483 in words is "twenty-one million, three hundred three thousand, four hundred eighty-three".