21916126 has 4 divisors (see below), whose sum is σ = 32874192. Its totient is φ = 10958062.

The previous prime is 21916117. The next prime is 21916127. The reversal of 21916126 is 62161912.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21916094 and 21916103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21916127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5479030 + ... + 5479033.

It is an arithmetic number, because the mean of its divisors is an integer number (8218548).

Almost surely, 2^21916126 is an apocalyptic number.

21916126 is a deficient number, since it is larger than the sum of its proper divisors (10958066).

21916126 is a wasteful number, since it uses less digits than its factorization.

21916126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958065.

The product of its digits is 1296, while the sum is 28.

The square root of 21916126 is about 4681.4662233108. The cubic root of 21916126 is about 279.8473913285.

The spelling of 21916126 in words is "twenty-one million, nine hundred sixteen thousand, one hundred twenty-six".