20385562039 has 4 divisors (see below), whose sum is σ = 20418818056. Its totient is φ = 20352306024.

The previous prime is 20385562007. The next prime is 20385562111. The reversal of 20385562039 is 93026558302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93026558302 = 2 ⋅46513279151.

It is a cyclic number.

It is not a de Polignac number, because 20385562039 - 2⁵ = 20385562007 is a prime.

It is a super-2 number, since 2×20385562039² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20385561986 and 20385562004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385562339) 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, 16627089 + ... + 16628314.

It is an arithmetic number, because the mean of its divisors is an integer number (5104704514).

Almost surely, 2^20385562039 is an apocalyptic number.

20385562039 is a deficient number, since it is larger than the sum of its proper divisors (33256017).

20385562039 is an equidigital number, since it uses as much as digits as its factorization.

20385562039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33256016.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 20385562039 in words is "twenty billion, three hundred eighty-five million, five hundred sixty-two thousand, thirty-nine".