20010243173 has 2 divisors, whose sum is σ = 20010243174. Its totient is φ = 20010243172.

The previous prime is 20010243163. The next prime is 20010243241. The reversal of 20010243173 is 37134201002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19995939649 + 14303524 = 141407^2 + 3782^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010243173 - 2⁴ = 20010243157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010243163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005121586 + 10005121587.

It is an arithmetic number, because the mean of its divisors is an integer number (10005121587).

Almost surely, 2^20010243173 is an apocalyptic number.

It is an amenable number.

20010243173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010243173 is an equidigital number, since it uses as much as digits as its factorization.

20010243173 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 23.

Adding to 20010243173 its reverse (37134201002), we get a palindrome (57144444175).

The spelling of 20010243173 in words is "twenty billion, ten million, two hundred forty-three thousand, one hundred seventy-three".