22091642 has 16 divisors (see below), whose sum is σ = 35406240. Its totient is φ = 10307088.

The previous prime is 22091621. The next prime is 22091647. The reversal of 22091642 is 24619022.

It is not an unprimeable number, because it can be changed into a prime (22091647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1793 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (2212890).

Almost surely, 2^22091642 is an apocalyptic number.

22091642 is a deficient number, since it is larger than the sum of its proper divisors (13314598).

22091642 is a wasteful number, since it uses less digits than its factorization.

22091642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8765.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 22091642 is about 4700.1746776051. The cubic root of 22091642 is about 280.5924614929.

The spelling of 22091642 in words is "twenty-two million, ninety-one thousand, six hundred forty-two".