21106967 has 8 divisors (see below), whose sum is σ = 25392000. Its totient is φ = 17139384.

The previous prime is 21106961. The next prime is 21106993. The reversal of 21106967 is 76960112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21106967 - 2¹² = 21102871 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 (21106961) 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, 79217 + ... + 79482.

It is an arithmetic number, because the mean of its divisors is an integer number (3174000).

Almost surely, 2^21106967 is an apocalyptic number.

21106967 is a deficient number, since it is larger than the sum of its proper divisors (4285033).

21106967 is a wasteful number, since it uses less digits than its factorization.

21106967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158725.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 21106967 is about 4594.2319271016. The cubic root of 21106967 is about 276.3600592016.

The spelling of 21106967 in words is "twenty-one million, one hundred six thousand, nine hundred sixty-seven".