20312144013 has 32 divisors (see below), whose sum is σ = 31364444160. Its totient is φ = 11452409280.

The previous prime is 20312144003. The next prime is 20312144023. The reversal of 20312144013 is 31044121302.

It is an interprime number because it is at equal distance from previous prime (20312144003) and next prime (20312144023).

It is not a de Polignac number, because 20312144013 - 2⁴ = 20312143997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312144003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3309958 + ... + 3316088.

It is an arithmetic number, because the mean of its divisors is an integer number (980138880).

Almost surely, 2^20312144013 is an apocalyptic number.

It is an amenable number.

20312144013 is a deficient number, since it is larger than the sum of its proper divisors (11052300147).

20312144013 is a wasteful number, since it uses less digits than its factorization.

20312144013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8217.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20312144013 its reverse (31044121302), we get a palindrome (51356265315).

The spelling of 20312144013 in words is "twenty billion, three hundred twelve million, one hundred forty-four thousand, thirteen".