20116115621051 has 4 divisors (see below), whose sum is σ = 20150038244952. Its totient is φ = 20082192997152.

The previous prime is 20116115621023. The next prime is 20116115621059. The reversal of 20116115621051 is 15012651161102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20116115621051 - 2³⁰ = 20115041879227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20116115620999 and 20116115621017.

It is not an unprimeable number, because it can be changed into a prime (20116115621059) 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 3 ways as a sum of consecutive naturals, for example, 16961311061 + ... + 16961312246.

It is an arithmetic number, because the mean of its divisors is an integer number (5037509561238).

Almost surely, 2^{20116115621051} is an apocalyptic number.

20116115621051 is a deficient number, since it is larger than the sum of its proper divisors (33922623901).

20116115621051 is an equidigital number, since it uses as much as digits as its factorization.

20116115621051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33922623900.

The product of its (nonzero) digits is 3600, while the sum is 32.

Adding to 20116115621051 its reverse (15012651161102), we get a palindrome (35128766782153).

The spelling of 20116115621051 in words is "twenty trillion, one hundred sixteen billion, one hundred fifteen million, six hundred twenty-one thousand, fifty-one".