20376431317 has 4 divisors (see below), whose sum is σ = 22228834176. Its totient is φ = 18524028460.

The previous prime is 20376431291. The next prime is 20376431321. The reversal of 20376431317 is 71313467302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20376431317 - 2⁷ = 20376431189 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 (20376437317) 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, 926201413 + ... + 926201434.

It is an arithmetic number, because the mean of its divisors is an integer number (5557208544).

Almost surely, 2^20376431317 is an apocalyptic number.

It is an amenable number.

20376431317 is a deficient number, since it is larger than the sum of its proper divisors (1852402859).

20376431317 is a wasteful number, since it uses less digits than its factorization.

20376431317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852402858.

The product of its (nonzero) digits is 63504, while the sum is 37.

Adding to 20376431317 its reverse (71313467302), we get a palindrome (91689898619).

The spelling of 20376431317 in words is "twenty billion, three hundred seventy-six million, four hundred thirty-one thousand, three hundred seventeen".