20171302131 has 8 divisors (see below), whose sum is σ = 26902917520. Its totient is φ = 13443610752.

The previous prime is 20171302121. The next prime is 20171302133. The reversal of 20171302131 is 13120317102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20171302131 is a prime.

It is a super-2 number, since 2×20171302131² (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 = 20171302098 and 20171302107.

It is not an unprimeable number, because it can be changed into a prime (20171302133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968986 + ... + 989583.

It is an arithmetic number, because the mean of its divisors is an integer number (3362864690).

Almost surely, 2^20171302131 is an apocalyptic number.

20171302131 is a deficient number, since it is larger than the sum of its proper divisors (6731615389).

20171302131 is a wasteful number, since it uses less digits than its factorization.

20171302131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962005.

The product of its (nonzero) digits is 252, while the sum is 21.

Adding to 20171302131 its reverse (13120317102), we get a palindrome (33291619233).

The spelling of 20171302131 in words is "twenty billion, one hundred seventy-one million, three hundred two thousand, one hundred thirty-one".