21014302303 has 4 divisors (see below), whose sum is σ = 21074862600. Its totient is φ = 20953742008.

The previous prime is 21014302261. The next prime is 21014302307. The reversal of 21014302303 is 30320341012.

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 21014302303 - 2¹⁷ = 21014171231 is a prime.

It is a super-2 number, since 2×21014302303² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014302307) 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 3 ways as a sum of consecutive naturals, for example, 30279628 + ... + 30280321.

It is an arithmetic number, because the mean of its divisors is an integer number (5268715650).

Almost surely, 2^21014302303 is an apocalyptic number.

21014302303 is a deficient number, since it is larger than the sum of its proper divisors (60560297).

21014302303 is an equidigital number, since it uses as much as digits as its factorization.

21014302303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60560296.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21014302303 its reverse (30320341012), we get a palindrome (51334643315).

The spelling of 21014302303 in words is "twenty-one billion, fourteen million, three hundred two thousand, three hundred three".