21413083 has 2 divisors, whose sum is σ = 21413084. Its totient is φ = 21413082.

The previous prime is 21413053. The next prime is 21413099. The reversal of 21413083 is 38031412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21413083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21413003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706541 + 10706542.

It is an arithmetic number, because the mean of its divisors is an integer number (10706542).

Almost surely, 2^21413083 is an apocalyptic number.

21413083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21413083 is an equidigital number, since it uses as much as digits as its factorization.

21413083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21413083 is about 4627.4272549658. The cubic root of 21413083 is about 277.6896758051.

Adding to 21413083 its reverse (38031412), we get a palindrome (59444495).

The spelling of 21413083 in words is "twenty-one million, four hundred thirteen thousand, eighty-three".