22108687 has 4 divisors (see below), whose sum is σ = 23409216. Its totient is φ = 20808160.

The previous prime is 22108651. The next prime is 22108693. The reversal of 22108687 is 78680122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78680122 = 2 ⋅39340061.

It is a cyclic number.

It is not a de Polignac number, because 22108687 - 2¹¹ = 22106639 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 (22108087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650239 + ... + 650272.

It is an arithmetic number, because the mean of its divisors is an integer number (5852304).

Almost surely, 2^22108687 is an apocalyptic number.

22108687 is a deficient number, since it is larger than the sum of its proper divisors (1300529).

22108687 is a wasteful number, since it uses less digits than its factorization.

22108687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300528.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 22108687 is about 4701.9875584693. The cubic root of 22108687 is about 280.6646074654.

The spelling of 22108687 in words is "twenty-two million, one hundred eight thousand, six hundred eighty-seven".