21463133 has 2 divisors, whose sum is σ = 21463134. Its totient is φ = 21463132.

The previous prime is 21463111. The next prime is 21463147. The reversal of 21463133 is 33136412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19035769 + 2427364 = 4363^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 21463133 - 2⁶ = 21463069 is a prime.

It is a Chen prime.

It is equal to p_1357421 and since 21463133 and 1357421 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 21463099 and 21463108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21463153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731566 + 10731567.

It is an arithmetic number, because the mean of its divisors is an integer number (10731567).

Almost surely, 2^21463133 is an apocalyptic number.

It is an amenable number.

21463133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21463133 is an equidigital number, since it uses as much as digits as its factorization.

21463133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 21463133 is about 4632.8320712066. The cubic root of 21463133 is about 277.9058606773.

Adding to 21463133 its reverse (33136412), we get a palindrome (54599545).

The spelling of 21463133 in words is "twenty-one million, four hundred sixty-three thousand, one hundred thirty-three".