20717001127 has 4 divisors (see below), whose sum is σ = 20720672856. Its totient is φ = 20713329400.

The previous prime is 20717001083. The next prime is 20717001161. The reversal of 20717001127 is 72110071702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20717001127 - 2⁷ = 20717000999 is a prime.

It is a super-2 number, since 2×20717001127² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20717001095 and 20717001104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717001427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827388 + ... + 1838689.

It is an arithmetic number, because the mean of its divisors is an integer number (5180168214).

Almost surely, 2^20717001127 is an apocalyptic number.

20717001127 is a deficient number, since it is larger than the sum of its proper divisors (3671729).

20717001127 is an equidigital number, since it uses as much as digits as its factorization.

20717001127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671728.

The product of its (nonzero) digits is 1372, while the sum is 28.

Adding to 20717001127 its reverse (72110071702), we get a palindrome (92827072829).

The spelling of 20717001127 in words is "twenty billion, seven hundred seventeen million, one thousand, one hundred twenty-seven".