22008642 has 16 divisors (see below), whose sum is σ = 46606752. Its totient is φ = 6904640.

The previous prime is 22008619. The next prime is 22008653. The reversal of 22008642 is 24680022.

It is an unprimeable number.

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, 107784 + ... + 107987.

It is an arithmetic number, because the mean of its divisors is an integer number (2912922).

Almost surely, 2^22008642 is an apocalyptic number.

22008642 is an abundant number, since it is smaller than the sum of its proper divisors (24598110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22008642 is a wasteful number, since it uses less digits than its factorization.

22008642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215793.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 22008642 is about 4691.3369096666. The cubic root of 22008642 is about 280.2406179956.

Adding to 22008642 its reverse (24680022), we get a palindrome (46688664).

The spelling of 22008642 in words is "twenty-two million, eight thousand, six hundred forty-two".