20308320239 has 4 divisors (see below), whose sum is σ = 20330419440. Its totient is φ = 20286221040.

The previous prime is 20308320211. The next prime is 20308320247. The reversal of 20308320239 is 93202380302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93202380302 = 2 ⋅46601190151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20308320239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308320289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11048222 + ... + 11050059.

It is an arithmetic number, because the mean of its divisors is an integer number (5082604860).

Almost surely, 2^20308320239 is an apocalyptic number.

20308320239 is a deficient number, since it is larger than the sum of its proper divisors (22099201).

20308320239 is an equidigital number, since it uses as much as digits as its factorization.

20308320239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22099200.

The product of its (nonzero) digits is 15552, while the sum is 32.

It can be divided in two parts, 203083 and 20239, that added together give a palindrome (223322).

The spelling of 20308320239 in words is "twenty billion, three hundred eight million, three hundred twenty thousand, two hundred thirty-nine".