20304103331 has 4 divisors (see below), whose sum is σ = 20304448200. Its totient is φ = 20303758464.

The previous prime is 20304103279. The next prime is 20304103363. The reversal of 20304103331 is 13330140302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20304103331 is a prime.

It is a super-2 number, since 2×20304103331² (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 (20304103381) 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, 59441 + ... + 210098.

It is an arithmetic number, because the mean of its divisors is an integer number (5076112050).

Almost surely, 2^20304103331 is an apocalyptic number.

20304103331 is a deficient number, since it is larger than the sum of its proper divisors (344869).

20304103331 is an equidigital number, since it uses as much as digits as its factorization.

20304103331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344868.

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

Adding to 20304103331 its reverse (13330140302), we get a palindrome (33634243633).

The spelling of 20304103331 in words is "twenty billion, three hundred four million, one hundred three thousand, three hundred thirty-one".