22740218 has 4 divisors (see below), whose sum is σ = 34110330. Its totient is φ = 11370108.

The previous prime is 22740217. The next prime is 22740227. The reversal of 22740218 is 81204722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 4481689 = 4273^2 + 2117^2 .

It is not an unprimeable number, because it can be changed into a prime (22740217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5685053 + ... + 5685056.

Almost surely, 2^22740218 is an apocalyptic number.

22740218 is a deficient number, since it is larger than the sum of its proper divisors (11370112).

22740218 is a wasteful number, since it uses less digits than its factorization.

22740218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370111.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 22740218 is about 4768.6704646054. The cubic root of 22740218 is about 283.3119377923.

The spelling of 22740218 in words is "twenty-two million, seven hundred forty thousand, two hundred eighteen".