20315326567 has 4 divisors (see below), whose sum is σ = 20318158080. Its totient is φ = 20312495056.

The previous prime is 20315326561. The next prime is 20315326609. The reversal of 20315326567 is 76562351302.

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 20315326567 - 2²⁷ = 20181108839 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 (20315326561) 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, 1404967 + ... + 1419352.

It is an arithmetic number, because the mean of its divisors is an integer number (5079539520).

Almost surely, 2^20315326567 is an apocalyptic number.

20315326567 is a deficient number, since it is larger than the sum of its proper divisors (2831513).

20315326567 is an equidigital number, since it uses as much as digits as its factorization.

20315326567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831512.

The product of its (nonzero) digits is 226800, while the sum is 40.

Adding to 20315326567 its reverse (76562351302), we get a palindrome (96877677869).

The spelling of 20315326567 in words is "twenty billion, three hundred fifteen million, three hundred twenty-six thousand, five hundred sixty-seven".