20100145171 has 2 divisors, whose sum is σ = 20100145172. Its totient is φ = 20100145170.

The previous prime is 20100145157. The next prime is 20100145229. The reversal of 20100145171 is 17154100102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100145171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100148171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050072585 + 10050072586.

It is an arithmetic number, because the mean of its divisors is an integer number (10050072586).

Almost surely, 2^20100145171 is an apocalyptic number.

20100145171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100145171 is an equidigital number, since it uses as much as digits as its factorization.

20100145171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 20100145171 its reverse (17154100102), we get a palindrome (37254245273).

The spelling of 20100145171 in words is "twenty billion, one hundred million, one hundred forty-five thousand, one hundred seventy-one".