22506685 has 8 divisors (see below), whose sum is σ = 27033696. Its totient is φ = 17988240.

The previous prime is 22506667. The next prime is 22506689. The reversal of 22506685 is 58660522.

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

It is not a de Polignac number, because 22506685 - 2⁹ = 22506173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22506685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506689) 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, 8130 + ... + 10540.

It is an arithmetic number, because the mean of its divisors is an integer number (3379212).

Almost surely, 2^22506685 is an apocalyptic number.

It is an amenable number.

22506685 is a deficient number, since it is larger than the sum of its proper divisors (4527011).

22506685 is a wasteful number, since it uses less digits than its factorization.

22506685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 22506685 is about 4744.1210987916. The cubic root of 22506685 is about 282.3387651218.

The spelling of 22506685 in words is "twenty-two million, five hundred six thousand, six hundred eighty-five".