22009142 has 8 divisors (see below), whose sum is σ = 33053832. Its totient is φ = 10991200.

The previous prime is 22009109. The next prime is 22009147. The reversal of 22009142 is 24190022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009147) 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, 4484 + ... + 8007.

It is an arithmetic number, because the mean of its divisors is an integer number (4131729).

Almost surely, 2^22009142 is an apocalyptic number.

22009142 is a deficient number, since it is larger than the sum of its proper divisors (11044690).

22009142 is a wasteful number, since it uses less digits than its factorization.

22009142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13374.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22009142 is about 4691.3901990775. The cubic root of 22009142 is about 280.2427401809.

Adding to 22009142 its reverse (24190022), we get a palindrome (46199164).

The spelling of 22009142 in words is "twenty-two million, nine thousand, one hundred forty-two".