21140003 has 2 divisors, whose sum is σ = 21140004. Its totient is φ = 21140002.

The previous prime is 21139999. The next prime is 21140011. The reversal of 21140003 is 30004112.

It is a happy number.

21140003 is nontrivially palindromic in base 7.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21140003 - 2² = 21139999 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570001 + 10570002.

It is an arithmetic number, because the mean of its divisors is an integer number (10570002).

Almost surely, 2^21140003 is an apocalyptic number.

21140003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140003 is an equidigital number, since it uses as much as digits as its factorization.

21140003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21140003 is about 4597.8258992702. The cubic root of 21140003 is about 276.5041675712.

Adding to 21140003 its reverse (30004112), we get a palindrome (51144115).

The spelling of 21140003 in words is "twenty-one million, one hundred forty thousand, three".