22006344 has 16 divisors (see below), whose sum is σ = 55015920. Its totient is φ = 7335440.

The previous prime is 22006343. The next prime is 22006349. The reversal of 22006344 is 44360022.

It is a self number, because there is not a number n which added to its sum of digits gives 22006344.

It is not an unprimeable number, because it can be changed into a prime (22006343) 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, 458442 + ... + 458489.

It is an arithmetic number, because the mean of its divisors is an integer number (3438495).

Almost surely, 2^22006344 is an apocalyptic number.

22006344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22006344 is an abundant number, since it is smaller than the sum of its proper divisors (33009576).

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

22006344 is a wasteful number, since it uses less digits than its factorization.

22006344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916940 (or 916936 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 22006344 is about 4691.0919837496. The cubic root of 22006344 is about 280.2308640188.

Adding to 22006344 its reverse (44360022), we get a palindrome (66366366).

The spelling of 22006344 in words is "twenty-two million, six thousand, three hundred forty-four".