22006681 has 8 divisors (see below), whose sum is σ = 22336160. Its totient is φ = 21679488.

The previous prime is 22006657. The next prime is 22006711. The reversal of 22006681 is 18660022.

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 22006681 - 2⁹ = 22006169 is a prime.

It is a super-2 number, since 2×22006681² = 968588017271522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22006181) 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, 29410 + ... + 30148.

It is an arithmetic number, because the mean of its divisors is an integer number (2792020).

Almost surely, 2^22006681 is an apocalyptic number.

It is an amenable number.

22006681 is a deficient number, since it is larger than the sum of its proper divisors (329479).

22006681 is an equidigital number, since it uses as much as digits as its factorization.

22006681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 22006681 is about 4691.1279027543. The cubic root of 22006681 is about 280.2322944747.

The spelling of 22006681 in words is "twenty-two million, six thousand, six hundred eighty-one".