22194993 has 8 divisors (see below), whose sum is σ = 29999008. Its totient is φ = 14593824.

The previous prime is 22194989. The next prime is 22195001. The reversal of 22194993 is 39949122.

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

It is not a de Polignac number, because 22194993 - 2² = 22194989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22194943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50455 + ... + 50892.

It is an arithmetic number, because the mean of its divisors is an integer number (3749876).

Almost surely, 2^22194993 is an apocalyptic number.

It is an amenable number.

22194993 is a deficient number, since it is larger than the sum of its proper divisors (7804015).

22194993 is a wasteful number, since it uses less digits than its factorization.

22194993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101423.

The product of its digits is 34992, while the sum is 39.

The square root of 22194993 is about 4711.1562275093. The cubic root of 22194993 is about 281.0293447569.

The spelling of 22194993 in words is "twenty-two million, one hundred ninety-four thousand, nine hundred ninety-three".