20247704102171 has 16 divisors (see below), whose sum is σ = 24953972870400. Its totient is φ = 15998483272608.

The previous prime is 20247704102123. The next prime is 20247704102189. The reversal of 20247704102171 is 17120140774202.

It is a cyclic number.

It is not a de Polignac number, because 20247704102171 - 2²⁶ = 20247636993307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20247704102971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150475541 + ... + 150610038.

It is an arithmetic number, because the mean of its divisors is an integer number (1559623304400).

Almost surely, 2^{20247704102171} is an apocalyptic number.

20247704102171 is a deficient number, since it is larger than the sum of its proper divisors (4706268768229).

20247704102171 is a wasteful number, since it uses less digits than its factorization.

20247704102171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301086338.

The product of its (nonzero) digits is 43904, while the sum is 38.

Adding to 20247704102171 its reverse (17120140774202), we get a palindrome (37367844876373).

The spelling of 20247704102171 in words is "twenty trillion, two hundred forty-seven billion, seven hundred four million, one hundred two thousand, one hundred seventy-one".