20163873 has 8 divisors (see below), whose sum is σ = 26915200. Its totient is φ = 13427568.

The previous prime is 20163863. The next prime is 20163889. The reversal of 20163873 is 37836102.

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

It is not a de Polignac number, because 20163873 - 2⁶ = 20163809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20163873.

It is not an unprimeable number, because it can be changed into a prime (20163863) 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, 118 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (3364400).

Almost surely, 2^20163873 is an apocalyptic number.

It is an amenable number.

20163873 is a deficient number, since it is larger than the sum of its proper divisors (6751327).

20163873 is a wasteful number, since it uses less digits than its factorization.

20163873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7511.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20163873 is about 4490.4201362456. The cubic root of 20163873 is about 272.1811122581.

Adding to 20163873 its reverse (37836102), we get a palindrome (57999975).

The spelling of 20163873 in words is "twenty million, one hundred sixty-three thousand, eight hundred seventy-three".