20047173 has 16 divisors (see below), whose sum is σ = 27787776. Its totient is φ = 12841920.

The previous prime is 20047151. The next prime is 20047177. The reversal of 20047173 is 37174002.

It is not a de Polignac number, because 20047173 - 2¹² = 20043077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13915 + ... + 15287.

It is an arithmetic number, because the mean of its divisors is an integer number (1736736).

Almost surely, 2^20047173 is an apocalyptic number.

It is an amenable number.

20047173 is a deficient number, since it is larger than the sum of its proper divisors (7740603).

20047173 is a wasteful number, since it uses less digits than its factorization.

20047173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20047173 is about 4477.4069504569. The cubic root of 20047173 is about 271.6550061280.

The spelling of 20047173 in words is "twenty million, forty-seven thousand, one hundred seventy-three".