21436301 has 2 divisors, whose sum is σ = 21436302. Its totient is φ = 21436300.

The previous prime is 21436271. The next prime is 21436319. The reversal of 21436301 is 10363412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 8404201 = 3610^2 + 2899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21436301 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21436361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10718150 + 10718151.

It is an arithmetic number, because the mean of its divisors is an integer number (10718151).

Almost surely, 2^21436301 is an apocalyptic number.

It is an amenable number.

21436301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21436301 is an equidigital number, since it uses as much as digits as its factorization.

21436301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 21436301 is about 4629.9353127231. The cubic root of 21436301 is about 277.7900049670.

Adding to 21436301 its reverse (10363412), we get a palindrome (31799713).

The spelling of 21436301 in words is "twenty-one million, four hundred thirty-six thousand, three hundred one".