20040004004002 has 8 divisors (see below), whose sum is σ = 30060083677212. Its totient is φ = 10019976111600.

The previous prime is 20040004003937. The next prime is 20040004004003. The reversal of 20040004004002 is 20040040004002.

It can be written as a sum of positive squares in 2 ways, for example, as 12328602686521 + 7711401317481 = 3511211^2 + 2776941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20040004004003) 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, 11962749 + ... + 13534672.

Almost surely, 2^{20040004004002} is an apocalyptic number.

20040004004002 is a deficient number, since it is larger than the sum of its proper divisors (10020079673210).

20040004004002 is a wasteful number, since it uses less digits than its factorization.

20040004004002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25890404.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20040004004002 its reverse (20040040004002), we get a palindrome (40080044008004).

Subtracting 20040004004002 from its reverse (20040040004002), we obtain a square (36000000 = 6000²).

The spelling of 20040004004002 in words is "twenty trillion, forty billion, four million, four thousand, two".