22168993 has 16 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 17130960.

The previous prime is 22168981. The next prime is 22168997. The reversal of 22168993 is 39986122.

It is a happy number.

It is not a de Polignac number, because 22168993 - 2⁵ = 22168961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22168997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8646 + ... + 10912.

It is an arithmetic number, because the mean of its divisors is an integer number (1741824).

Almost surely, 2^22168993 is an apocalyptic number.

It is an amenable number.

22168993 is a deficient number, since it is larger than the sum of its proper divisors (5700191).

22168993 is a wasteful number, since it uses less digits than its factorization.

22168993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 46656, while the sum is 40.

The square root of 22168993 is about 4708.3960113822. The cubic root of 22168993 is about 280.9195659740.

The spelling of 22168993 in words is "twenty-two million, one hundred sixty-eight thousand, nine hundred ninety-three".