2064243021 has 4 divisors (see below), whose sum is σ = 2752324032. Its totient is φ = 1376162012.

The previous prime is 2064243019. The next prime is 2064243029. The reversal of 2064243021 is 1203424602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2064243021 - 2¹ = 2064243019 is a prime.

It is a super-2 number, since 2×2064243021² = 8522198499494412882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2064242982 and 2064243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064243029) 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 in 3 ways as a sum of consecutive naturals, for example, 344040501 + ... + 344040506.

It is an arithmetic number, because the mean of its divisors is an integer number (688081008).

Almost surely, 2^2064243021 is an apocalyptic number.

It is an amenable number.

2064243021 is a deficient number, since it is larger than the sum of its proper divisors (688081011).

2064243021 is an equidigital number, since it uses as much as digits as its factorization.

2064243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688081010.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2064243021 is about 45433.9412884245. The cubic root of 2064243021 is about 1273.2693208975.

Adding to 2064243021 its reverse (1203424602), we get a palindrome (3267667623).

The spelling of 2064243021 in words is "two billion, sixty-four million, two hundred forty-three thousand, twenty-one".