20323210331 has 4 divisors (see below), whose sum is σ = 21392853000. Its totient is φ = 19253567664.

The previous prime is 20323210319. The next prime is 20323210381. The reversal of 20323210331 is 13301232302.

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 20323210331 - 2⁶ = 20323210267 is a prime.

It is a super-2 number, since 2×20323210331² (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 (20323210381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534821306 + ... + 534821343.

It is an arithmetic number, because the mean of its divisors is an integer number (5348213250).

Almost surely, 2^20323210331 is an apocalyptic number.

20323210331 is a deficient number, since it is larger than the sum of its proper divisors (1069642669).

20323210331 is a wasteful number, since it uses less digits than its factorization.

20323210331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069642668.

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

Adding to 20323210331 its reverse (13301232302), we get a palindrome (33624442633).

The spelling of 20323210331 in words is "twenty billion, three hundred twenty-three million, two hundred ten thousand, three hundred thirty-one".