36820621 has 2 divisors, whose sum is σ = 36820622. Its totient is φ = 36820620.

The previous prime is 36820607. The next prime is 36820627. The reversal of 36820621 is 12602863.

36820621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 2175625 = 5886^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 36820621 - 2¹⁵ = 36787853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36820621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36820627) 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, 18410310 + 18410311.

It is an arithmetic number, because the mean of its divisors is an integer number (18410311).

Almost surely, 2^36820621 is an apocalyptic number.

It is an amenable number.

36820621 is a deficient number, since it is larger than the sum of its proper divisors (1).

36820621 is an equidigital number, since it uses as much as digits as its factorization.

36820621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 36820621 is about 6067.9997528016. Note that the first 3 decimals coincide. The cubic root of 36820621 is about 332.6828165317.

The spelling of 36820621 in words is "thirty-six million, eight hundred twenty thousand, six hundred twenty-one".