10821930 has 64 divisors (see below), whose sum is σ = 30723840. Its totient is φ = 2386944.

The previous prime is 10821929. The next prime is 10821931. The reversal of 10821930 is 3912801.

It is an interprime number because it is at equal distance from previous prime (10821929) and next prime (10821931).

It is a super-2 number, since 2×10821930² = 234228337849800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10821930.

It is not an unprimeable number, because it can be changed into a prime (10821931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5202 + ... + 6978.

It is an arithmetic number, because the mean of its divisors is an integer number (480060).

Almost surely, 2^10821930 is an apocalyptic number.

10821930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10821930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15361920).

10821930 is an abundant number, since it is smaller than the sum of its proper divisors (19901910).

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

10821930 is a wasteful number, since it uses less digits than its factorization.

10821930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 10821930 is about 3289.6701962355. The cubic root of 10821930 is about 221.1914013795.

The spelling of 10821930 in words is "ten million, eight hundred twenty-one thousand, nine hundred thirty".