22686641 has 4 divisors (see below), whose sum is σ = 22707312. Its totient is φ = 22665972.

The previous prime is 22686617. The next prime is 22686647. The reversal of 22686641 is 14668622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22686641 - 2¹⁸ = 22424497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22686647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8591 + ... + 10916.

It is an arithmetic number, because the mean of its divisors is an integer number (5676828).

Almost surely, 2^22686641 is an apocalyptic number.

It is an amenable number.

22686641 is a deficient number, since it is larger than the sum of its proper divisors (20671).

22686641 is a wasteful number, since it uses less digits than its factorization.

22686641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20670.

The product of its digits is 27648, while the sum is 35.

The square root of 22686641 is about 4763.0495483461. The cubic root of 22686641 is about 283.0892641702.

The spelling of 22686641 in words is "twenty-two million, six hundred eighty-six thousand, six hundred forty-one".