22031018 has 8 divisors (see below), whose sum is σ = 34112640. Its totient is φ = 10660140.

The previous prime is 22031017. The next prime is 22031027. The reversal of 22031018 is 81013022.

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

It is a Curzon number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22030987 and 22031005.

It is not an unprimeable number, because it can be changed into a prime (22031017) 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, 177608 + ... + 177731.

It is an arithmetic number, because the mean of its divisors is an integer number (4264080).

Almost surely, 2^22031018 is an apocalyptic number.

22031018 is a deficient number, since it is larger than the sum of its proper divisors (12081622).

22031018 is a wasteful number, since it uses less digits than its factorization.

22031018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355372.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 22031018 is about 4693.7211250776. The cubic root of 22031018 is about 280.3355585824.

The spelling of 22031018 in words is "twenty-two million, thirty-one thousand, eighteen".