21830852 has 12 divisors (see below), whose sum is σ = 39521580. Its totient is φ = 10538976.

The previous prime is 21830843. The next prime is 21830891. The reversal of 21830852 is 25803812.

It can be written as a sum of positive squares in 2 ways, for example, as 4056196 + 17774656 = 2014^2 + 4216^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

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 3 ways as a sum of consecutive naturals, for example, 93983 + ... + 94214.

It is an arithmetic number, because the mean of its divisors is an integer number (3293465).

Almost surely, 2^21830852 is an apocalyptic number.

It is an amenable number.

21830852 is a deficient number, since it is larger than the sum of its proper divisors (17690728).

21830852 is a wasteful number, since it uses less digits than its factorization.

21830852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188230 (or 188228 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 21830852 is about 4672.3497300609. The cubic root of 21830852 is about 279.4839645051.

The spelling of 21830852 in words is "twenty-one million, eight hundred thirty thousand, eight hundred fifty-two".