22518011 has 4 divisors (see below), whose sum is σ = 22528224. Its totient is φ = 22507800.

The previous prime is 22517993. The next prime is 22518017. The reversal of 22518011 is 11081522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22518011 - 2⁶ = 22517947 is a prime.

It is a super-2 number, since 2×22518011² = 1014121638792242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22518017) 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, 275 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (5632056).

Almost surely, 2^22518011 is an apocalyptic number.

22518011 is a deficient number, since it is larger than the sum of its proper divisors (10213).

22518011 is an equidigital number, since it uses as much as digits as its factorization.

22518011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10212.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 22518011 is about 4745.3146365652. The cubic root of 22518011 is about 282.3861174618.

Adding to 22518011 its reverse (11081522), we get a palindrome (33599533).

The spelling of 22518011 in words is "twenty-two million, five hundred eighteen thousand, eleven".