21832830 has 48 divisors (see below), whose sum is σ = 57006144. Its totient is φ = 5797440.

The previous prime is 21832823. The next prime is 21832831. The reversal of 21832830 is 3823812.

It is a junction number, because it is equal to n+sod(n) for n = 21832794 and 21832803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21832831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32700 + ... + 33360.

It is an arithmetic number, because the mean of its divisors is an integer number (1187628).

Almost surely, 2^21832830 is an apocalyptic number.

21832830 is an abundant number, since it is smaller than the sum of its proper divisors (35173314).

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

21832830 is a wasteful number, since it uses less digits than its factorization.

21832830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 21832830 is about 4672.5613960653. The cubic root of 21832830 is about 279.4924051985.

The spelling of 21832830 in words is "twenty-one million, eight hundred thirty-two thousand, eight hundred thirty".