20315232127 has 4 divisors (see below), whose sum is σ = 20335130536. Its totient is φ = 20295333720.

The previous prime is 20315232109. The next prime is 20315232167. The reversal of 20315232127 is 72123251302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315232127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315232095 and 20315232104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315232167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9947673 + ... + 9949714.

It is an arithmetic number, because the mean of its divisors is an integer number (5083782634).

Almost surely, 2^20315232127 is an apocalyptic number.

20315232127 is a deficient number, since it is larger than the sum of its proper divisors (19898409).

20315232127 is a wasteful number, since it uses less digits than its factorization.

20315232127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19898408.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 20315232127 its reverse (72123251302), we get a palindrome (92438483429).

The spelling of 20315232127 in words is "twenty billion, three hundred fifteen million, two hundred thirty-two thousand, one hundred twenty-seven".