20188199 has 8 divisors (see below), whose sum is σ = 21217680. Its totient is φ = 19184256.

The previous prime is 20188169. The next prime is 20188219. The reversal of 20188199 is 99188102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20188199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20188109) 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, 4754 + ... + 7935.

It is an arithmetic number, because the mean of its divisors is an integer number (2652210).

Almost surely, 2^20188199 is an apocalyptic number.

20188199 is a deficient number, since it is larger than the sum of its proper divisors (1029481).

20188199 is a wasteful number, since it uses less digits than its factorization.

20188199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12769.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 20188199 is about 4493.1279750303. The cubic root of 20188199 is about 272.2905227358.

The spelling of 20188199 in words is "twenty million, one hundred eighty-eight thousand, one hundred ninety-nine".