10646366021 has 4 divisors (see below), whose sum is σ = 10696822944. Its totient is φ = 10595909100.

The previous prime is 10646366011. The next prime is 10646366023. The reversal of 10646366021 is 12066364601.

10646366021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10646366021 - 2¹⁰ = 10646364997 is a prime.

It is a super-2 number, since 2×10646366021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10646366023) 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, 25228145 + ... + 25228566.

It is an arithmetic number, because the mean of its divisors is an integer number (2674205736).

Almost surely, 2^10646366021 is an apocalyptic number.

It is an amenable number.

10646366021 is a deficient number, since it is larger than the sum of its proper divisors (50456923).

10646366021 is an equidigital number, since it uses as much as digits as its factorization.

10646366021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50456922.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 10646366021 in words is "ten billion, six hundred forty-six million, three hundred sixty-six thousand, twenty-one".