21433103 has 2 divisors, whose sum is σ = 21433104. Its totient is φ = 21433102.

The previous prime is 21433057. The next prime is 21433123. The reversal of 21433103 is 30133412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21433103 - 2¹⁰ = 21432079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716551 + 10716552.

It is an arithmetic number, because the mean of its divisors is an integer number (10716552).

Almost surely, 2^21433103 is an apocalyptic number.

21433103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433103 is an equidigital number, since it uses as much as digits as its factorization.

21433103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21433103 is about 4629.5899386447. The cubic root of 21433103 is about 277.7761901361.

Adding to 21433103 its reverse (30133412), we get a palindrome (51566515).

The spelling of 21433103 in words is "twenty-one million, four hundred thirty-three thousand, one hundred three".