21463373 has 2 divisors, whose sum is σ = 21463374. Its totient is φ = 21463372.

The previous prime is 21463363. The next prime is 21463417. The reversal of 21463373 is 37336412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21362884 + 100489 = 4622^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 21463373 - 2¹⁴ = 21446989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21463363) 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, 10731686 + 10731687.

It is an arithmetic number, because the mean of its divisors is an integer number (10731687).

Almost surely, 2^21463373 is an apocalyptic number.

It is an amenable number.

21463373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21463373 is an equidigital number, since it uses as much as digits as its factorization.

21463373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 29.

The square root of 21463373 is about 4632.8579732170. The cubic root of 21463373 is about 277.9068965179.

Adding to 21463373 its reverse (37336412), we get a palindrome (58799785).

The spelling of 21463373 in words is "twenty-one million, four hundred sixty-three thousand, three hundred seventy-three".