20331023131 has 8 divisors (see below), whose sum is σ = 21409801280. Its totient is φ = 19253117448.

The previous prime is 20331023099. The next prime is 20331023137. The reversal of 20331023131 is 13132013302.

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 20331023131 - 2⁵ = 20331023099 is a prime.

It is a super-2 number, since 2×20331023131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331023099 and 20331023108.

It is not an unprimeable number, because it can be changed into a prime (20331023137) 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, 170001 + ... + 263746.

It is an arithmetic number, because the mean of its divisors is an integer number (2676225160).

Almost surely, 2^20331023131 is an apocalyptic number.

20331023131 is a deficient number, since it is larger than the sum of its proper divisors (1078778149).

20331023131 is a wasteful number, since it uses less digits than its factorization.

20331023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436233.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20331023131 its reverse (13132013302), we get a palindrome (33463036433).

The spelling of 20331023131 in words is "twenty billion, three hundred thirty-one million, twenty-three thousand, one hundred thirty-one".