20004304356506 has 8 divisors (see below), whose sum is σ = 30019870245780. Its totient is φ = 9997680941248.

The previous prime is 20004304356503. The next prime is 20004304356557. The reversal of 20004304356506 is 60565340340002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15437787519025 + 4566516837481 = 3929095^2 + 2136941^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20004304356506.

It is not an unprimeable number, because it can be changed into a prime (20004304356503) 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, 2235612911 + ... + 2235621858.

Almost surely, 2^{20004304356506} is an apocalyptic number.

20004304356506 is a deficient number, since it is larger than the sum of its proper divisors (10015565889274).

20004304356506 is a wasteful number, since it uses less digits than its factorization.

20004304356506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471237008.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 20004304356506 its reverse (60565340340002), we get a palindrome (80569644696508).

The spelling of 20004304356506 in words is "twenty trillion, four billion, three hundred four million, three hundred fifty-six thousand, five hundred six".