22129994 has 8 divisors (see below), whose sum is σ = 33362400. Its totient is φ = 11009196.

The previous prime is 22129981. The next prime is 22129999. The reversal of 22129994 is 49992122.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22129999) 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, 27404 + ... + 28199.

It is an arithmetic number, because the mean of its divisors is an integer number (4170300).

Almost surely, 2^22129994 is an apocalyptic number.

22129994 is a deficient number, since it is larger than the sum of its proper divisors (11232406).

22129994 is a wasteful number, since it uses less digits than its factorization.

22129994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55804.

The product of its digits is 23328, while the sum is 38.

The square root of 22129994 is about 4704.2527568148. The cubic root of 22129994 is about 280.7547409760.

The spelling of 22129994 in words is "twenty-two million, one hundred twenty-nine thousand, nine hundred ninety-four".