20343001331 has 4 divisors (see below), whose sum is σ = 20346150552. Its totient is φ = 20339852112.

The previous prime is 20343001303. The next prime is 20343001369. The reversal of 20343001331 is 13310034302.

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 20343001331 - 2⁶ = 20343001267 is a prime.

It is a super-2 number, since 2×20343001331² (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 (20343000331) 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, 1564901 + ... + 1577846.

It is an arithmetic number, because the mean of its divisors is an integer number (5086537638).

Almost surely, 2^20343001331 is an apocalyptic number.

20343001331 is a deficient number, since it is larger than the sum of its proper divisors (3149221).

20343001331 is an equidigital number, since it uses as much as digits as its factorization.

20343001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149220.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20343001331 its reverse (13310034302), we get a palindrome (33653035633).

The spelling of 20343001331 in words is "twenty billion, three hundred forty-three million, one thousand, three hundred thirty-one".