20312143011 has 32 divisors (see below), whose sum is σ = 30650419200. Its totient is φ = 13291115040.

The previous prime is 20312143003. The next prime is 20312143057. The reversal of 20312143011 is 11034121302.

20312143011 is a `hidden beast` number, since 203 + 1 + 21 + 430 + 11 = 666.

It is not a de Polignac number, because 20312143011 - 2³ = 20312143003 is a prime.

It is a super-3 number, since 3×20312143011³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20312143081) 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, 776040 + ... + 801786.

It is an arithmetic number, because the mean of its divisors is an integer number (957825600).

Almost surely, 2^20312143011 is an apocalyptic number.

20312143011 is a deficient number, since it is larger than the sum of its proper divisors (10338276189).

20312143011 is a wasteful number, since it uses less digits than its factorization.

20312143011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26296 (or 26290 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20312143011 its reverse (11034121302), we get a palindrome (31346264313).

The spelling of 20312143011 in words is "twenty billion, three hundred twelve million, one hundred forty-three thousand, eleven".