22740818 has 4 divisors (see below), whose sum is σ = 34111230. Its totient is φ = 11370408.

The previous prime is 22740811. The next prime is 22740833. The reversal of 22740818 is 81804722.

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., 11404129 + 11336689 = 3377^2 + 3367^2 .

It is not an unprimeable number, because it can be changed into a prime (22740811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5685203 + ... + 5685206.

Almost surely, 2^22740818 is an apocalyptic number.

22740818 is a deficient number, since it is larger than the sum of its proper divisors (11370412).

22740818 is a wasteful number, since it uses less digits than its factorization.

22740818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11370411.

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

The square root of 22740818 is about 4768.7333748072. The cubic root of 22740818 is about 283.3144294962.

The spelling of 22740818 in words is "twenty-two million, seven hundred forty thousand, eight hundred eighteen".