20133131131 has 8 divisors (see below), whose sum is σ = 20183915520. Its totient is φ = 20082384168.

The previous prime is 20133131111. The next prime is 20133131143. The reversal of 20133131131 is 13113133102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20133131131 - 2⁵ = 20133131099 is a prime.

It is a super-2 number, since 2×20133131131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20133131099 and 20133131108.

It is not an unprimeable number, because it can be changed into a prime (20133131111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288890 + ... + 1304416.

It is an arithmetic number, because the mean of its divisors is an integer number (2522989440).

Almost surely, 2^20133131131 is an apocalyptic number.

20133131131 is a deficient number, since it is larger than the sum of its proper divisors (50784389).

20133131131 is a wasteful number, since it uses less digits than its factorization.

20133131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18713.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 20133131131 its reverse (13113133102), we get a palindrome (33246264233).

The spelling of 20133131131 in words is "twenty billion, one hundred thirty-three million, one hundred thirty-one thousand, one hundred thirty-one".