10320821 has 12 divisors (see below), whose sum is σ = 12060288. Its totient is φ = 8806392.

The previous prime is 10320803. The next prime is 10320829. The reversal of 10320821 is 12802301.

It is not a de Polignac number, because 10320821 - 2⁶ = 10320757 is a prime.

It is a super-2 number, since 2×10320821² = 213038692228082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10320821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10320829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16700 + ... + 17306.

It is an arithmetic number, because the mean of its divisors is an integer number (1005024).

Almost surely, 2^10320821 is an apocalyptic number.

It is an amenable number.

10320821 is a deficient number, since it is larger than the sum of its proper divisors (1739467).

10320821 is an equidigital number, since it uses as much as digits as its factorization.

10320821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 10320821 is about 3212.6034613690. The cubic root of 10320821 is about 217.7232199879.

The spelling of 10320821 in words is "ten million, three hundred twenty thousand, eight hundred twenty-one".