21234022 has 8 divisors (see below), whose sum is σ = 31878000. Its totient is φ = 10608024.

The previous prime is 21234013. The next prime is 21234029. The reversal of 21234022 is 22043212.

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

It is a super-3 number, since 3×21234022³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233987 and 21234005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234029) 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, 997 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (3984750).

Almost surely, 2^21234022 is an apocalyptic number.

21234022 is a deficient number, since it is larger than the sum of its proper divisors (10643978).

21234022 is a wasteful number, since it uses less digits than its factorization.

21234022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8990.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21234022 is about 4608.0388453224. The cubic root of 21234022 is about 276.9134737371.

Adding to 21234022 its reverse (22043212), we get a palindrome (43277234).

The spelling of 21234022 in words is "twenty-one million, two hundred thirty-four thousand, twenty-two".