21414422 has 16 divisors (see below), whose sum is σ = 32944320. Its totient is φ = 10435008.

The previous prime is 21414413. The next prime is 21414427. The reversal of 21414422 is 22441412.

It is a junction number, because it is equal to n+sod(n) for n = 21414394 and 21414403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38168 + ... + 38724.

It is an arithmetic number, because the mean of its divisors is an integer number (2059020).

Almost surely, 2^21414422 is an apocalyptic number.

21414422 is a deficient number, since it is larger than the sum of its proper divisors (11529898).

21414422 is a wasteful number, since it uses less digits than its factorization.

21414422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 512, while the sum is 20.

The square root of 21414422 is about 4627.5719335306. The cubic root of 21414422 is about 277.6954638355.

Adding to 21414422 its reverse (22441412), we get a palindrome (43855834).

The spelling of 21414422 in words is "twenty-one million, four hundred fourteen thousand, four hundred twenty-two".