21314403 has 12 divisors (see below), whose sum is σ = 33586488. Its totient is φ = 12917760.

The previous prime is 21314401. The next prime is 21314411. The reversal of 21314403 is 30441312.

It is not a de Polignac number, because 21314403 - 2¹ = 21314401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21314401) 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 11 ways as a sum of consecutive naturals, for example, 107550 + ... + 107747.

It is an arithmetic number, because the mean of its divisors is an integer number (2798874).

Almost surely, 2^21314403 is an apocalyptic number.

21314403 is a deficient number, since it is larger than the sum of its proper divisors (12272085).

21314403 is a wasteful number, since it uses less digits than its factorization.

21314403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215314 (or 215311 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21314403 is about 4616.7524300096. The cubic root of 21314403 is about 277.2624507132.

Adding to 21314403 its reverse (30441312), we get a palindrome (51755715).

The spelling of 21314403 in words is "twenty-one million, three hundred fourteen thousand, four hundred three".