22086821 has 8 divisors (see below), whose sum is σ = 22709280. Its totient is φ = 21469392.

The previous prime is 22086793. The next prime is 22086839. The reversal of 22086821 is 12868022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22086821 is a prime.

It is a magnanimous number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22086871) 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, 8726 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (2838660).

Almost surely, 2^22086821 is an apocalyptic number.

It is an amenable number.

22086821 is a deficient number, since it is larger than the sum of its proper divisors (622459).

22086821 is a wasteful number, since it uses less digits than its factorization.

22086821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 22086821 is about 4699.6617963424. The cubic root of 22086821 is about 280.5720490269.

The spelling of 22086821 in words is "twenty-two million, eighty-six thousand, eight hundred twenty-one".