20453301173 has 2 divisors, whose sum is σ = 20453301174. Its totient is φ = 20453301172.

The previous prime is 20453301131. The next prime is 20453301199. The reversal of 20453301173 is 37110335402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16521760369 + 3931540804 = 128537^2 + 62702^2 .

It is a cyclic number.

It is not a de Polignac number, because 20453301173 - 2¹⁶ = 20453235637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20453300173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226650586 + 10226650587.

It is an arithmetic number, because the mean of its divisors is an integer number (10226650587).

Almost surely, 2^20453301173 is an apocalyptic number.

It is an amenable number.

20453301173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453301173 is an equidigital number, since it uses as much as digits as its factorization.

20453301173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

Adding to 20453301173 its reverse (37110335402), we get a palindrome (57563636575).

The spelling of 20453301173 in words is "twenty billion, four hundred fifty-three million, three hundred one thousand, one hundred seventy-three".