22180869 has 12 divisors (see below), whose sum is σ = 33923916. Its totient is φ = 13917312.

The previous prime is 22180859. The next prime is 22180889. The reversal of 22180869 is 96808122.

It can be written as a sum of positive squares in 2 ways, for example, as 8208225 + 13972644 = 2865^2 + 3738^2 .

It is not a de Polignac number, because 22180869 - 2⁹ = 22180357 is a prime.

It is a super-2 number, since 2×22180869² = 983981899190322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72334 + ... + 72639.

It is an arithmetic number, because the mean of its divisors is an integer number (2826993).

Almost surely, 2^22180869 is an apocalyptic number.

It is an amenable number.

22180869 is a deficient number, since it is larger than the sum of its proper divisors (11743047).

22180869 is a wasteful number, since it uses less digits than its factorization.

22180869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144996 (or 144993 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 22180869 is about 4709.6569938797. The cubic root of 22180869 is about 280.9697201872.

The spelling of 22180869 in words is "twenty-two million, one hundred eighty thousand, eight hundred sixty-nine".