20188873 has 4 divisors (see below), whose sum is σ = 20301840. Its totient is φ = 20075908.

The previous prime is 20188853. The next prime is 20188879. The reversal of 20188873 is 37888102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20188873 - 2⁵ = 20188841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20188879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56215 + ... + 56572.

It is an arithmetic number, because the mean of its divisors is an integer number (5075460).

Almost surely, 2^20188873 is an apocalyptic number.

It is an amenable number.

20188873 is a deficient number, since it is larger than the sum of its proper divisors (112967).

20188873 is a wasteful number, since it uses less digits than its factorization.

20188873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112966.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 20188873 is about 4493.2029778322. The cubic root of 20188873 is about 272.2935529181.

The spelling of 20188873 in words is "twenty million, one hundred eighty-eight thousand, eight hundred seventy-three".