20011323131 has 8 divisors (see below), whose sum is σ = 20109654864. Its totient is φ = 19913098240.

The previous prime is 20011323109. The next prime is 20011323139. The reversal of 20011323131 is 13132311002.

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 20011323131 - 2¹⁸ = 20011060987 is a prime.

It is a super-2 number, since 2×20011323131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011323139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362651 + ... + 414171.

It is an arithmetic number, because the mean of its divisors is an integer number (2513706858).

Almost surely, 2^20011323131 is an apocalyptic number.

20011323131 is a deficient number, since it is larger than the sum of its proper divisors (98331733).

20011323131 is a wasteful number, since it uses less digits than its factorization.

20011323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53421.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20011323131 its reverse (13132311002), we get a palindrome (33143634133).

The spelling of 20011323131 in words is "twenty billion, eleven million, three hundred twenty-three thousand, one hundred thirty-one".