20204451557336 has 8 divisors (see below), whose sum is σ = 37883346670020. Its totient is φ = 10102225778664.

The previous prime is 20204451557333. The next prime is 20204451557341. The reversal of 20204451557336 is 63375515440202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204451557333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262778222326 + ... + 1262778222341.

Almost surely, 2^{20204451557336} is an apocalyptic number.

It is an amenable number.

20204451557336 is a deficient number, since it is larger than the sum of its proper divisors (17678895112684).

20204451557336 is a wasteful number, since it uses less digits than its factorization.

20204451557336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525556444673 (or 2525556444669 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 47.

Adding to 20204451557336 its reverse (63375515440202), we get a palindrome (83579966997538).

The spelling of 20204451557336 in words is "twenty trillion, two hundred four billion, four hundred fifty-one million, five hundred fifty-seven thousand, three hundred thirty-six".