20453171 has 2 divisors, whose sum is σ = 20453172. Its totient is φ = 20453170.

The previous prime is 20453123. The next prime is 20453201. The reversal of 20453171 is 17135402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20453171 - 2¹⁰ = 20452147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20452171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226585 + 10226586.

It is an arithmetic number, because the mean of its divisors is an integer number (10226586).

Almost surely, 2^20453171 is an apocalyptic number.

20453171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453171 is an equidigital number, since it uses as much as digits as its factorization.

20453171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20453171 is about 4522.5182144465. The cubic root of 20453171 is about 273.4766280507.

Adding to 20453171 its reverse (17135402), we get a palindrome (37588573).

The spelling of 20453171 in words is "twenty million, four hundred fifty-three thousand, one hundred seventy-one".