20432173 has 2 divisors, whose sum is σ = 20432174. Its totient is φ = 20432172.

The previous prime is 20432161. The next prime is 20432183. The reversal of 20432173 is 37123402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19909444 + 522729 = 4462^2 + 723^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432173 - 2⁹ = 20431661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216086 + 10216087.

It is an arithmetic number, because the mean of its divisors is an integer number (10216087).

Almost surely, 2^20432173 is an apocalyptic number.

It is an amenable number.

20432173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432173 is an equidigital number, since it uses as much as digits as its factorization.

20432173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20432173 is about 4520.1961240636. The cubic root of 20432173 is about 273.3830088510.

Adding to 20432173 its reverse (37123402), we get a palindrome (57555575).

The spelling of 20432173 in words is "twenty million, four hundred thirty-two thousand, one hundred seventy-three".