21113422 has 16 divisors (see below), whose sum is σ = 36582192. Its totient is φ = 9032320.

The previous prime is 21113399. The next prime is 21113423. The reversal of 21113422 is 22431112.

It is a junction number, because it is equal to n+sod(n) for n = 21113396 and 21113405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113423) 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, 27853 + ... + 28600.

It is an arithmetic number, because the mean of its divisors is an integer number (2286387).

Almost surely, 2^21113422 is an apocalyptic number.

21113422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21113422 is a deficient number, since it is larger than the sum of its proper divisors (15468770).

21113422 is a wasteful number, since it uses less digits than its factorization.

21113422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56483.

The product of its digits is 96, while the sum is 16.

The square root of 21113422 is about 4594.9343847328. The cubic root of 21113422 is about 276.3882287686.

Adding to 21113422 its reverse (22431112), we get a palindrome (43544534).

The spelling of 21113422 in words is "twenty-one million, one hundred thirteen thousand, four hundred twenty-two".