22180138 has 8 divisors (see below), whose sum is σ = 35227332. Its totient is φ = 10437696.

The previous prime is 22180111. The next prime is 22180141. The reversal of 22180138 is 83108122.

It can be written as a sum of positive squares in 2 ways, for example, as 21874329 + 305809 = 4677^2 + 553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326145 + ... + 326212.

Almost surely, 2^22180138 is an apocalyptic number.

22180138 is a deficient number, since it is larger than the sum of its proper divisors (13047194).

22180138 is a wasteful number, since it uses less digits than its factorization.

22180138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652376.

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

The square root of 22180138 is about 4709.5793867393. The cubic root of 22180138 is about 280.9666335765.

The spelling of 22180138 in words is "twenty-two million, one hundred eighty thousand, one hundred thirty-eight".