21363077 has 2 divisors, whose sum is σ = 21363078. Its totient is φ = 21363076.

The previous prime is 21363059. The next prime is 21363079. The reversal of 21363077 is 77036312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18653761 + 2709316 = 4319^2 + 1646^2 .

It is a cyclic number.

It is not a de Polignac number, because 21363077 - 2¹⁶ = 21297541 is a prime.

Together with 21363079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21363079) 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, 10681538 + 10681539.

It is an arithmetic number, because the mean of its divisors is an integer number (10681539).

Almost surely, 2^21363077 is an apocalyptic number.

It is an amenable number.

21363077 is a deficient number, since it is larger than the sum of its proper divisors (1).

21363077 is an equidigital number, since it uses as much as digits as its factorization.

21363077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 21363077 is about 4622.0208783605. The cubic root of 21363077 is about 277.4733443000.

Adding to 21363077 its reverse (77036312), we get a palindrome (98399389).

The spelling of 21363077 in words is "twenty-one million, three hundred sixty-three thousand, seventy-seven".