20513363171 has 16 divisors (see below), whose sum is σ = 24021903360. Its totient is φ = 17149561920.

The previous prime is 20513363161. The next prime is 20513363197. The reversal of 20513363171 is 17136331502.

It is a cyclic number.

It is not a de Polignac number, because 20513363171 - 2⁶ = 20513363107 is a prime.

It is a super-3 number, since 3×20513363171³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20513363161) 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, 1545200 + ... + 1558418.

It is an arithmetic number, because the mean of its divisors is an integer number (1501368960).

Almost surely, 2^20513363171 is an apocalyptic number.

20513363171 is a deficient number, since it is larger than the sum of its proper divisors (3508540189).

20513363171 is a wasteful number, since it uses less digits than its factorization.

20513363171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18674.

The product of its (nonzero) digits is 11340, while the sum is 32.

Adding to 20513363171 its reverse (17136331502), we get a palindrome (37649694673).

The spelling of 20513363171 in words is "twenty billion, five hundred thirteen million, three hundred sixty-three thousand, one hundred seventy-one".