21108914 has 8 divisors (see below), whose sum is σ = 31705968. Its totient is φ = 10540260.

The previous prime is 21108911. The next prime is 21108929. The reversal of 21108914 is 41980112.

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

It is not an unprimeable number, because it can be changed into a prime (21108911) 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, 5132 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (3963246).

Almost surely, 2^21108914 is an apocalyptic number.

21108914 is a deficient number, since it is larger than the sum of its proper divisors (10597054).

21108914 is a wasteful number, since it uses less digits than its factorization.

21108914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 21108914 is about 4594.4438183528. The cubic root of 21108914 is about 276.3685564984.

It can be divided in two parts, 21108 and 914, that added together give a palindrome (22022).

The spelling of 21108914 in words is "twenty-one million, one hundred eight thousand, nine hundred fourteen".