20315327111 has 4 divisors (see below), whose sum is σ = 20316591792. Its totient is φ = 20314062432.

The previous prime is 20315327101. The next prime is 20315327147. The reversal of 20315327111 is 11172351302.

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-20315327111 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 (20315327101) 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, 607931 + ... + 640476.

It is an arithmetic number, because the mean of its divisors is an integer number (5079147948).

Almost surely, 2^20315327111 is an apocalyptic number.

20315327111 is a deficient number, since it is larger than the sum of its proper divisors (1264681).

20315327111 is a wasteful number, since it uses less digits than its factorization.

20315327111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264680.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 20315327111 its reverse (11172351302), we get a palindrome (31487678413).

The spelling of 20315327111 in words is "twenty billion, three hundred fifteen million, three hundred twenty-seven thousand, one hundred eleven".