21434222 has 8 divisors (see below), whose sum is σ = 32180016. Its totient is φ = 10707552.

The previous prime is 21434221. The next prime is 21434227. The reversal of 21434222 is 22243412.

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 = 21434194 and 21434203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434221) 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, 1538 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (4022502).

Almost surely, 2^21434222 is an apocalyptic number.

21434222 is a deficient number, since it is larger than the sum of its proper divisors (10745794).

21434222 is a wasteful number, since it uses less digits than its factorization.

21434222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9562.

The product of its digits is 768, while the sum is 20.

The square root of 21434222 is about 4629.7107901034. The cubic root of 21434222 is about 277.7810241872.

Adding to 21434222 its reverse (22243412), we get a palindrome (43677634).

The spelling of 21434222 in words is "twenty-one million, four hundred thirty-four thousand, two hundred twenty-two".