21085022 has 32 divisors (see below), whose sum is σ = 39290880. Its totient is φ = 8281440.

The previous prime is 21084989. The next prime is 21085033. The reversal of 21085022 is 22058012.

It is a junction number, because it is equal to n+sod(n) for n = 21084985 and 21085003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6968 + ... + 9524.

It is an arithmetic number, because the mean of its divisors is an integer number (1227840).

Almost surely, 2^21085022 is an apocalyptic number.

21085022 is a deficient number, since it is larger than the sum of its proper divisors (18205858).

21085022 is a wasteful number, since it uses less digits than its factorization.

21085022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 21085022 is about 4591.8429851205. The cubic root of 21085022 is about 276.2642484273.

The spelling of 21085022 in words is "twenty-one million, eighty-five thousand, twenty-two".