21022622 has 8 divisors (see below), whose sum is σ = 32621400. Its totient is φ = 10148824.

The previous prime is 21022597. The next prime is 21022669. The reversal of 21022622 is 22622012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21022622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181172 + ... + 181287.

It is an arithmetic number, because the mean of its divisors is an integer number (4077675).

Almost surely, 2^21022622 is an apocalyptic number.

21022622 is a deficient number, since it is larger than the sum of its proper divisors (11598778).

21022622 is a wasteful number, since it uses less digits than its factorization.

21022622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362490.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21022622 is about 4585.0432931435. The cubic root of 21022622 is about 275.9914493605.

Adding to 21022622 its reverse (22622012), we get a palindrome (43644634).

The spelling of 21022622 in words is "twenty-one million, twenty-two thousand, six hundred twenty-two".