21600022 has 8 divisors (see below), whose sum is σ = 32810400. Its totient is φ = 10663224.

The previous prime is 21600011. The next prime is 21600023. The reversal of 21600022 is 22000612.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21599975 and 21600011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68197 + ... + 68512.

It is an arithmetic number, because the mean of its divisors is an integer number (4101300).

Almost surely, 2^21600022 is an apocalyptic number.

21600022 is a deficient number, since it is larger than the sum of its proper divisors (11210378).

21600022 is a wasteful number, since it uses less digits than its factorization.

21600022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136790.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21600022 is about 4647.5823822715. The cubic root of 21600022 is about 278.4954245676.

Adding to 21600022 its reverse (22000612), we get a palindrome (43600634).

The spelling of 21600022 in words is "twenty-one million, six hundred thousand, twenty-two".