20004080136121 has 16 divisors (see below), whose sum is σ = 20303646105600. Its totient is φ = 19705015330000.

The previous prime is 20004080136109. The next prime is 20004080136137. The reversal of 20004080136121 is 12163108040002.

It is a cyclic number.

It is not a de Polignac number, because 20004080136121 - 2⁹ = 20004080135609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20004080136121.

It is not an unprimeable number, because it can be changed into a prime (20004080136101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525864420 + ... + 525902458.

It is an arithmetic number, because the mean of its divisors is an integer number (1268977881600).

Almost surely, 2^{20004080136121} is an apocalyptic number.

It is an amenable number.

20004080136121 is a deficient number, since it is larger than the sum of its proper divisors (299565969479).

20004080136121 is a wasteful number, since it uses less digits than its factorization.

20004080136121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44420.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 20004080136121 its reverse (12163108040002), we get a palindrome (32167188176123).

The spelling of 20004080136121 in words is "twenty trillion, four billion, eighty million, one hundred thirty-six thousand, one hundred twenty-one".