21140303 has 2 divisors, whose sum is σ = 21140304. Its totient is φ = 21140302.

The previous prime is 21140291. The next prime is 21140341. The reversal of 21140303 is 30304112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21140303 - 2⁶ = 21140239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570151 + 10570152.

It is an arithmetic number, because the mean of its divisors is an integer number (10570152).

Almost surely, 2^21140303 is an apocalyptic number.

21140303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140303 is an equidigital number, since it uses as much as digits as its factorization.

21140303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21140303 is about 4597.8585232693. The cubic root of 21140303 is about 276.5054755316.

Adding to 21140303 its reverse (30304112), we get a palindrome (51444415).

The spelling of 21140303 in words is "twenty-one million, one hundred forty thousand, three hundred three".