10321020 has 120 divisors (see below), whose sum is σ = 33907104. Its totient is φ = 2623104.

The previous prime is 10320983. The next prime is 10321021. The reversal of 10321020 is 2012301.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 10320993 and 10321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10321021) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37122 + ... + 37398.

Almost surely, 2^10321020 is an apocalyptic number.

10321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10321020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16953552).

10321020 is an abundant number, since it is smaller than the sum of its proper divisors (23586084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10321020 is a wasteful number, since it uses less digits than its factorization.

10321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 310 counting only the distinct ones).

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

The square root of 10321020 is about 3212.6344329849. The cubic root of 10321020 is about 217.7246193159.

Adding to 10321020 its reverse (2012301), we get a palindrome (12333321).

The spelling of 10321020 in words is "ten million, three hundred twenty-one thousand, twenty".