220194993 has 8 divisors (see below), whose sum is σ = 293813568. Its totient is φ = 146686544.

The previous prime is 220194991. The next prime is 220195039. The reversal of 220194993 is 399491022.

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

It is a cyclic number.

It is not a de Polignac number, because 220194993 - 2¹ = 220194991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220194991) 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, 22746 + ... + 30947.

It is an arithmetic number, because the mean of its divisors is an integer number (36726696).

Almost surely, 2^220194993 is an apocalyptic number.

It is an amenable number.

220194993 is a deficient number, since it is larger than the sum of its proper divisors (73618575).

220194993 is a wasteful number, since it uses less digits than its factorization.

220194993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55063.

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

The square root of 220194993 is about 14838.9687310136. The cubic root of 220194993 is about 603.8593749267.

The spelling of 220194993 in words is "two hundred twenty million, one hundred ninety-four thousand, nine hundred ninety-three".