10021320 has 96 divisors (see below), whose sum is σ = 33808320. Its totient is φ = 2669760.

The previous prime is 10021301. The next prime is 10021331. The reversal of 10021320 is 2312001.

10021320 = T₄₆₀ + T₄₆₁ + ... + T₅₃₉.

It is a happy number.

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

It is a nialpdrome in base 6.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9205 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (352170).

Almost surely, 2^10021320 is an apocalyptic number.

10021320 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 10021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16904160).

10021320 is an abundant number, since it is smaller than the sum of its proper divisors (23787000).

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

10021320 is a wasteful number, since it uses less digits than its factorization.

10021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057 (or 1041 counting only the distinct ones).

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

The square root of 10021320 is about 3165.6468533303. The cubic root of 10021320 is about 215.5964688148.

Adding to 10021320 its reverse (2312001), we get a palindrome (12333321).

The spelling of 10021320 in words is "ten million, twenty-one thousand, three hundred twenty".