20510133071 has 16 divisors (see below), whose sum is σ = 21160258560. Its totient is φ = 19872745920.

The previous prime is 20510133047. The next prime is 20510133179. The reversal of 20510133071 is 17033101502.

It is a cyclic number.

It is not a de Polignac number, because 20510133071 - 2²² = 20505938767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510133041) 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, 1075106 + ... + 1094016.

It is an arithmetic number, because the mean of its divisors is an integer number (1322516160).

Almost surely, 2^20510133071 is an apocalyptic number.

20510133071 is a deficient number, since it is larger than the sum of its proper divisors (650125489).

20510133071 is a wasteful number, since it uses less digits than its factorization.

20510133071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19246.

The product of its (nonzero) digits is 630, while the sum is 23.

Adding to 20510133071 its reverse (17033101502), we get a palindrome (37543234573).

The spelling of 20510133071 in words is "twenty billion, five hundred ten million, one hundred thirty-three thousand, seventy-one".