10020321 has 16 divisors (see below), whose sum is σ = 14963520. Its totient is φ = 6626880.

The previous prime is 10020313. The next prime is 10020323. The reversal of 10020321 is 12302001.

It is a happy number.

10020321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10020321 - 2³ = 10020313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10020323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (935220).

Almost surely, 2^10020321 is an apocalyptic number.

It is an amenable number.

10020321 is a deficient number, since it is larger than the sum of its proper divisors (4943199).

10020321 is a wasteful number, since it uses less digits than its factorization.

10020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973 (or 2967 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 10020321 is about 3165.4890617407. The cubic root of 10020321 is about 215.5893044881.

Adding to 10020321 its reverse (12302001), we get a palindrome (22322322).

The spelling of 10020321 in words is "ten million, twenty thousand, three hundred twenty-one".