21116326 has 16 divisors (see below), whose sum is σ = 39490560. Its totient is φ = 8227080.

The previous prime is 21116317. The next prime is 21116351. The reversal of 21116326 is 62361112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21116297 and 21116306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68406 + ... + 68713.

It is an arithmetic number, because the mean of its divisors is an integer number (2468160).

Almost surely, 2^21116326 is an apocalyptic number.

21116326 is a deficient number, since it is larger than the sum of its proper divisors (18374234).

21116326 is a wasteful number, since it uses less digits than its factorization.

21116326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137139.

The product of its digits is 432, while the sum is 22.

The square root of 21116326 is about 4595.2503740275. The cubic root of 21116326 is about 276.4008999282.

Adding to 21116326 its reverse (62361112), we get a palindrome (83477438).

The spelling of 21116326 in words is "twenty-one million, one hundred sixteen thousand, three hundred twenty-six".