16360021 has 2 divisors, whose sum is σ = 16360022. Its totient is φ = 16360020.

The previous prime is 16359997. The next prime is 16360037. The reversal of 16360021 is 12006361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11458225 + 4901796 = 3385^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 16360021 - 2¹⁹ = 15835733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16360921) 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, 8180010 + 8180011.

It is an arithmetic number, because the mean of its divisors is an integer number (8180011).

Almost surely, 2^16360021 is an apocalyptic number.

It is an amenable number.

16360021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16360021 is an equidigital number, since it uses as much as digits as its factorization.

16360021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 16360021 is about 4044.7522791884. The cubic root of 16360021 is about 253.8602006237.

Adding to 16360021 its reverse (12006361), we get a palindrome (28366382).

The spelling of 16360021 in words is "sixteen million, three hundred sixty thousand, twenty-one".