20127351612816 has 60 divisors (see below), whose sum is σ = 64375576987072. Its totient is φ = 5750671889088.

The previous prime is 20127351612803. The next prime is 20127351612817. The reversal of 20127351612816 is 61821615372102.

20127351612816 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 7 + 3 + 516 + 128 + 1 + 6 = 666.

It is a super-2 number, since 2×20127351612816² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20127351612817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9983804356 + ... + 9983806371.

Almost surely, 2^{20127351612816} is an apocalyptic number.

It is an amenable number.

20127351612816 is an abundant number, since it is smaller than the sum of its proper divisors (44248225374256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20127351612816 is a wasteful number, since it uses less digits than its factorization.

20127351612816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19967610748 (or 19967610739 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

Adding to 20127351612816 its reverse (61821615372102), we get a palindrome (81948966984918).

The spelling of 20127351612816 in words is "twenty trillion, one hundred twenty-seven billion, three hundred fifty-one million, six hundred twelve thousand, eight hundred sixteen".