21792210 has 32 divisors (see below), whose sum is σ = 57056832. Its totient is φ = 5282880.

The previous prime is 21792203. The next prime is 21792233. The reversal of 21792210 is 1229712.

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, 32689 + ... + 33348.

It is an arithmetic number, because the mean of its divisors is an integer number (1783026).

Almost surely, 2^21792210 is an apocalyptic number.

21792210 is an abundant number, since it is smaller than the sum of its proper divisors (35264622).

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

21792210 is a wasteful number, since it uses less digits than its factorization.

21792210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66058.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 21792210 is about 4668.2127200889. The cubic root of 21792210 is about 279.3189656348.

The spelling of 21792210 in words is "twenty-one million, seven hundred ninety-two thousand, two hundred ten".