21363622 has 16 divisors (see below), whose sum is σ = 36691200. Its totient is φ = 9138888.

The previous prime is 21363613. The next prime is 21363637. The reversal of 21363622 is 22636312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9129 + ... + 11227.

It is an arithmetic number, because the mean of its divisors is an integer number (2293200).

Almost surely, 2^21363622 is an apocalyptic number.

21363622 is a deficient number, since it is larger than the sum of its proper divisors (15327578).

21363622 is a wasteful number, since it uses less digits than its factorization.

21363622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835.

The product of its digits is 2592, while the sum is 25.

The square root of 21363622 is about 4622.0798348795. The cubic root of 21363622 is about 277.4757038491.

Adding to 21363622 its reverse (22636312), we get a palindrome (43999934).

It can be divided in two parts, 2136362 and 2, that multiplied together give a palindrome (4272724).

The spelling of 21363622 in words is "twenty-one million, three hundred sixty-three thousand, six hundred twenty-two".