21104967 has 8 divisors (see below), whose sum is σ = 30304624. Its totient is φ = 12987648.

The previous prime is 21104947. The next prime is 21104981. The reversal of 21104967 is 76940112.

It is a happy number.

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

It is not a de Polignac number, because 21104967 - 2⁶ = 21104903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104947) 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, 270538 + ... + 270615.

It is an arithmetic number, because the mean of its divisors is an integer number (3788078).

Almost surely, 2^21104967 is an apocalyptic number.

21104967 is a deficient number, since it is larger than the sum of its proper divisors (9199657).

21104967 is a wasteful number, since it uses less digits than its factorization.

21104967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541169.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 21104967 is about 4594.0142577053. The cubic root of 21104967 is about 276.3513300526.

The spelling of 21104967 in words is "twenty-one million, one hundred four thousand, nine hundred sixty-seven".