22642318 has 4 divisors (see below), whose sum is σ = 33963480. Its totient is φ = 11321158.

The previous prime is 22642313. The next prime is 22642331. The reversal of 22642318 is 81324622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81324622 = 2 ⋅40662311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22642313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660578 + ... + 5660581.

It is an arithmetic number, because the mean of its divisors is an integer number (8490870).

Almost surely, 2^22642318 is an apocalyptic number.

22642318 is a deficient number, since it is larger than the sum of its proper divisors (11321162).

22642318 is a wasteful number, since it uses less digits than its factorization.

22642318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11321161.

The product of its digits is 4608, while the sum is 28.

The square root of 22642318 is about 4758.3944771320. The cubic root of 22642318 is about 282.9047863591.

The spelling of 22642318 in words is "twenty-two million, six hundred forty-two thousand, three hundred eighteen".