20304105897 has 4 divisors (see below), whose sum is σ = 27072141200. Its totient is φ = 13536070596.

The previous prime is 20304105779. The next prime is 20304105911. The reversal of 20304105897 is 79850140302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20304105897 - 2¹⁴ = 20304089513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304105197) 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, 3384017647 + ... + 3384017652.

It is an arithmetic number, because the mean of its divisors is an integer number (6768035300).

Almost surely, 2^20304105897 is an apocalyptic number.

It is an amenable number.

20304105897 is a deficient number, since it is larger than the sum of its proper divisors (6768035303).

20304105897 is an equidigital number, since it uses as much as digits as its factorization.

20304105897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768035302.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20304105897 in words is "twenty billion, three hundred four million, one hundred five thousand, eight hundred ninety-seven".