20191873 has 8 divisors (see below), whose sum is σ = 22044008. Its totient is φ = 18382464.

The previous prime is 20191867. The next prime is 20191879. The reversal of 20191873 is 37819102.

It is an interprime number because it is at equal distance from previous prime (20191867) and next prime (20191879).

It can be written as a sum of positive squares in 4 ways, for example, as 49729 + 20142144 = 223^2 + 4488^2 .

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 20191873 - 2⁵ = 20191841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20191879) 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, 9690 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (2755501).

Almost surely, 2^20191873 is an apocalyptic number.

It is an amenable number.

20191873 is a deficient number, since it is larger than the sum of its proper divisors (1852135).

20191873 is a wasteful number, since it uses less digits than its factorization.

20191873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21363.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 20191873 is about 4493.5368030094. The cubic root of 20191873 is about 272.3070395583.

The spelling of 20191873 in words is "twenty million, one hundred ninety-one thousand, eight hundred seventy-three".