20320100331 has 4 divisors (see below), whose sum is σ = 27093467112. Its totient is φ = 13546733552.

The previous prime is 20320100327. The next prime is 20320100369. The reversal of 20320100331 is 13300102302.

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 20320100331 - 2² = 20320100327 is a prime.

It is a super-2 number, since 2×20320100331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20320100331.

It is not an unprimeable number, because it can be changed into a prime (20320100231) 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, 3386683386 + ... + 3386683391.

It is an arithmetic number, because the mean of its divisors is an integer number (6773366778).

Almost surely, 2^20320100331 is an apocalyptic number.

20320100331 is a deficient number, since it is larger than the sum of its proper divisors (6773366781).

20320100331 is an equidigital number, since it uses as much as digits as its factorization.

20320100331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773366780.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20320100331 its reverse (13300102302), we get a palindrome (33620202633).

The spelling of 20320100331 in words is "twenty billion, three hundred twenty million, one hundred thousand, three hundred thirty-one".