21403214303 has 2 divisors, whose sum is σ = 21403214304. Its totient is φ = 21403214302.

The previous prime is 21403214299. The next prime is 21403214311. The reversal of 21403214303 is 30341230412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21403214303 - 2² = 21403214299 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21403264303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701607151 + 10701607152.

It is an arithmetic number, because the mean of its divisors is an integer number (10701607152).

Almost surely, 2^21403214303 is an apocalyptic number.

21403214303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403214303 is an equidigital number, since it uses as much as digits as its factorization.

21403214303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21403214303 its reverse (30341230412), we get a palindrome (51744444715).

The spelling of 21403214303 in words is "twenty-one billion, four hundred three million, two hundred fourteen thousand, three hundred three".