20717001126 has 80 divisors (see below), whose sum is σ = 47566056384. Its totient is φ = 6736369536.

The previous prime is 20717001083. The next prime is 20717001161. The reversal of 20717001126 is 62110071702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20717001126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2378836 + ... + 2387528.

Almost surely, 2^20717001126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20717001126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23783028192).

20717001126 is an abundant number, since it is smaller than the sum of its proper divisors (26849055258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20717001126 is a wasteful number, since it uses less digits than its factorization.

20717001126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9067 (or 9058 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

Adding to 20717001126 its reverse (62110071702), we get a palindrome (82827072828).

The spelling of 20717001126 in words is "twenty billion, seven hundred seventeen million, one thousand, one hundred twenty-six".