20040478039 has 4 divisors (see below), whose sum is σ = 20184654280. Its totient is φ = 19896301800.

The previous prime is 20040478037. The next prime is 20040478061. The reversal of 20040478039 is 93087404002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20040478039 - 2¹ = 20040478037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20040477989 and 20040478007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040478037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72087912 + ... + 72088189.

It is an arithmetic number, because the mean of its divisors is an integer number (5046163570).

Almost surely, 2^20040478039 is an apocalyptic number.

20040478039 is a deficient number, since it is larger than the sum of its proper divisors (144176241).

20040478039 is a wasteful number, since it uses less digits than its factorization.

20040478039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144176240.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 20040478039 in words is "twenty billion, forty million, four hundred seventy-eight thousand, thirty-nine".