20143199 has 4 divisors (see below), whose sum is σ = 20176464. Its totient is φ = 20109936.

The previous prime is 20143171. The next prime is 20143219. The reversal of 20143199 is 99134102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20143199 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 (20143129) 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, 15707 + ... + 16940.

It is an arithmetic number, because the mean of its divisors is an integer number (5044116).

Almost surely, 2^20143199 is an apocalyptic number.

20143199 is a deficient number, since it is larger than the sum of its proper divisors (33265).

20143199 is an equidigital number, since it uses as much as digits as its factorization.

20143199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33264.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20143199 is about 4488.1175341116. The cubic root of 20143199 is about 272.0880581020.

The spelling of 20143199 in words is "twenty million, one hundred forty-three thousand, one hundred ninety-nine".