20338902239 has 4 divisors (see below), whose sum is σ = 20342674800. Its totient is φ = 20335129680.

The previous prime is 20338902211. The next prime is 20338902271. The reversal of 20338902239 is 93220983302.

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-20338902239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20338902196 and 20338902205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338922239) 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, 1878182 + ... + 1888979.

It is an arithmetic number, because the mean of its divisors is an integer number (5085668700).

Almost surely, 2^20338902239 is an apocalyptic number.

20338902239 is a deficient number, since it is larger than the sum of its proper divisors (3772561).

20338902239 is an equidigital number, since it uses as much as digits as its factorization.

20338902239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772560.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 20338902239 in words is "twenty billion, three hundred thirty-eight million, nine hundred two thousand, two hundred thirty-nine".