21832090 has 32 divisors (see below), whose sum is σ = 46013184. Its totient is φ = 7301760.

The previous prime is 21832087. The next prime is 21832103. The reversal of 21832090 is 9023812.

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 15 ways as a sum of consecutive naturals, for example, 934 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (1437912).

Almost surely, 2^21832090 is an apocalyptic number.

21832090 is an abundant number, since it is smaller than the sum of its proper divisors (24181094).

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

21832090 is a wasteful number, since it uses less digits than its factorization.

21832090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21832090 is about 4672.4822097040. The cubic root of 21832090 is about 279.4892474660.

The spelling of 21832090 in words is "twenty-one million, eight hundred thirty-two thousand, ninety".