2021623369 has 2 divisors, whose sum is σ = 2021623370. Its totient is φ = 2021623368.

The previous prime is 2021623363. The next prime is 2021623393. The reversal of 2021623369 is 9633261202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1366263369 + 655360000 = 36963^2 + 25600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021623369 - 2¹³ = 2021615177 is a prime.

It is a super-2 number, since 2×2021623369² = 8173922092173820322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021623363) 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, 1010811684 + 1010811685.

It is an arithmetic number, because the mean of its divisors is an integer number (1010811685).

Almost surely, 2^2021623369 is an apocalyptic number.

It is an amenable number.

2021623369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021623369 is an equidigital number, since it uses as much as digits as its factorization.

2021623369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 2021623369 is about 44962.4662246190. The cubic root of 2021623369 is about 1264.4454065163.

The spelling of 2021623369 in words is "two billion, twenty-one million, six hundred twenty-three thousand, three hundred sixty-nine".