20311330231 has 8 divisors (see below), whose sum is σ = 21454129664. Its totient is φ = 19199005560.

The previous prime is 20311330223. The next prime is 20311330253. The reversal of 20311330231 is 13203311302.

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

It is not a de Polignac number, because 20311330231 - 2³ = 20311330223 is a prime.

It is a super-2 number, since 2×20311330231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20311330199 and 20311330208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311330631) 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, 7617321 + ... + 7619986.

It is an arithmetic number, because the mean of its divisors is an integer number (2681766208).

Almost surely, 2^20311330231 is an apocalyptic number.

20311330231 is a deficient number, since it is larger than the sum of its proper divisors (1142799433).

20311330231 is a wasteful number, since it uses less digits than its factorization.

20311330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15237381.

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

Adding to 20311330231 its reverse (13203311302), we get a palindrome (33514641533).

The spelling of 20311330231 in words is "twenty billion, three hundred eleven million, three hundred thirty thousand, two hundred thirty-one".