21462773 has 2 divisors, whose sum is σ = 21462774. Its totient is φ = 21462772.

The previous prime is 21462767. The next prime is 21462781. The reversal of 21462773 is 37726412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20857489 + 605284 = 4567^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 21462773 - 2¹⁸ = 21200629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21452773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731386 + 10731387.

It is an arithmetic number, because the mean of its divisors is an integer number (10731387).

Almost surely, 2^21462773 is an apocalyptic number.

It is an amenable number.

21462773 is a deficient number, since it is larger than the sum of its proper divisors (1).

21462773 is an equidigital number, since it uses as much as digits as its factorization.

21462773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 32.

The square root of 21462773 is about 4632.7932179194. The cubic root of 21462773 is about 277.9043069018.

The spelling of 21462773 in words is "twenty-one million, four hundred sixty-two thousand, seven hundred seventy-three".