363520021 has 2 divisors, whose sum is σ = 363520022. Its totient is φ = 363520020.

The previous prime is 363520019. The next prime is 363520033. The reversal of 363520021 is 120025363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363474225 + 45796 = 19065^2 + 214^2 .

It is an emirp because it is prime and its reverse (120025363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 363520021 - 2¹ = 363520019 is a prime.

Together with 363520019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 363519974 and 363520001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (363520121) 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, 181760010 + 181760011.

It is an arithmetic number, because the mean of its divisors is an integer number (181760011).

Almost surely, 2^363520021 is an apocalyptic number.

It is an amenable number.

363520021 is a deficient number, since it is larger than the sum of its proper divisors (1).

363520021 is an equidigital number, since it uses as much as digits as its factorization.

363520021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 363520021 is about 19066.2010112135. The cubic root of 363520021 is about 713.6897260994.

Adding to 363520021 its reverse (120025363), we get a palindrome (483545384).

The spelling of 363520021 in words is "three hundred sixty-three million, five hundred twenty thousand, twenty-one".