20127054015021 has 16 divisors (see below), whose sum is σ = 27178090623936. Its totient is φ = 13247249237376.

The previous prime is 20127054015001. The next prime is 20127054015053. The reversal of 20127054015021 is 12051045072102.

It is a happy number.

It is not a de Polignac number, because 20127054015021 - 2¹¹ = 20127054012973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20127054015021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127054015001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27453600 + ... + 28177193.

It is an arithmetic number, because the mean of its divisors is an integer number (1698630663996).

Almost surely, 2^{20127054015021} is an apocalyptic number.

It is an amenable number.

20127054015021 is a deficient number, since it is larger than the sum of its proper divisors (7051036608915).

20127054015021 is a wasteful number, since it uses less digits than its factorization.

20127054015021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55632332.

The product of its (nonzero) digits is 5600, while the sum is 30.

Adding to 20127054015021 its reverse (12051045072102), we get a palindrome (32178099087123).

The spelling of 20127054015021 in words is "twenty trillion, one hundred twenty-seven billion, fifty-four million, fifteen thousand, twenty-one".