21403483 has 2 divisors, whose sum is σ = 21403484. Its totient is φ = 21403482.

The previous prime is 21403463. The next prime is 21403559. The reversal of 21403483 is 38430412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21403483 - 2⁹ = 21402971 is a prime.

It is not a weakly prime, because it can be changed into another prime (21403433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701741 + 10701742.

It is an arithmetic number, because the mean of its divisors is an integer number (10701742).

Almost surely, 2^21403483 is an apocalyptic number.

21403483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403483 is an equidigital number, since it uses as much as digits as its factorization.

21403483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 21403483 is about 4626.3898452249. The cubic root of 21403483 is about 277.6481712824.

Adding to 21403483 its reverse (38430412), we get a palindrome (59833895).

The spelling of 21403483 in words is "twenty-one million, four hundred three thousand, four hundred eighty-three".