22047818 has 8 divisors (see below), whose sum is σ = 35615748. Its totient is φ = 10175904.

The previous prime is 22047811. The next prime is 22047853. The reversal of 22047818 is 81874022.

It can be written as a sum of positive squares in 2 ways, for example, as 20638849 + 1408969 = 4543^2 + 1187^2 .

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

It is a super-2 number, since 2×22047818² = 972212557122248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22047811) 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, 423971 + ... + 424022.

Almost surely, 2^22047818 is an apocalyptic number.

22047818 is a deficient number, since it is larger than the sum of its proper divisors (13567930).

22047818 is a wasteful number, since it uses less digits than its factorization.

22047818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848008.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 22047818 is about 4695.5104088906. The cubic root of 22047818 is about 280.4067981526.

The spelling of 22047818 in words is "twenty-two million, forty-seven thousand, eight hundred eighteen".