22188013 has 4 divisors (see below), whose sum is σ = 22226400. Its totient is φ = 22149628.

The previous prime is 22188007. The next prime is 22188053. The reversal of 22188013 is 31088122.

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 22188013 - 2⁵ = 22187981 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 (22188053) 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, 18313 + ... + 19486.

It is an arithmetic number, because the mean of its divisors is an integer number (5556600).

Almost surely, 2^22188013 is an apocalyptic number.

It is an amenable number.

22188013 is a deficient number, since it is larger than the sum of its proper divisors (38387).

22188013 is an equidigital number, since it uses as much as digits as its factorization.

22188013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38386.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 22188013 is about 4710.4153744654. The cubic root of 22188013 is about 280.9998817981. Note that the first 3 decimals are identical.

The spelling of 22188013 in words is "twenty-two million, one hundred eighty-eight thousand, thirteen".