20012320331 has 4 divisors (see below), whose sum is σ = 20031042000. Its totient is φ = 19993598664.

The previous prime is 20012320313. The next prime is 20012320337. The reversal of 20012320331 is 13302321002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20012320331 - 2⁶ = 20012320267 is a prime.

It is a super-2 number, since 2×20012320331² (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 (20012320337) 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 3 ways as a sum of consecutive naturals, for example, 9359231 + ... + 9361368.

It is an arithmetic number, because the mean of its divisors is an integer number (5007760500).

Almost surely, 2^20012320331 is an apocalyptic number.

20012320331 is a deficient number, since it is larger than the sum of its proper divisors (18721669).

20012320331 is a wasteful number, since it uses less digits than its factorization.

20012320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18721668.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20012320331 its reverse (13302321002), we get a palindrome (33314641333).

The spelling of 20012320331 in words is "twenty billion, twelve million, three hundred twenty thousand, three hundred thirty-one".