21041622 has 48 divisors (see below), whose sum is σ = 53793792. Its totient is φ = 5816880.

The previous prime is 21041621. The next prime is 21041623. The reversal of 21041622 is 22614012.

21041622 is a `hidden beast` number, since 2 + 1 + 0 + 41 + 622 = 666.

It is an interprime number because it is at equal distance from previous prime (21041621) and next prime (21041623).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21041595 and 21041604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (1120704).

Almost surely, 2^21041622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21041622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26896896).

21041622 is an abundant number, since it is smaller than the sum of its proper divisors (32752170).

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

21041622 is a wasteful number, since it uses less digits than its factorization.

21041622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433 (or 5430 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21041622 is about 4587.1147794665. The cubic root of 21041622 is about 276.0745702728.

Adding to 21041622 its reverse (22614012), we get a palindrome (43655634).

The spelling of 21041622 in words is "twenty-one million, forty-one thousand, six hundred twenty-two".