20411162130421 has 4 divisors (see below), whose sum is σ = 20598420498700. Its totient is φ = 20223903762144.

The previous prime is 20411162130371. The next prime is 20411162130449. The reversal of 20411162130421 is 12403126111402.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16131067322500 + 4280094807921 = 4016350^2 + 2068839^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411162130421 - 2¹³ = 20411162122229 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 20411162130421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411162130721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93629183976 + ... + 93629184193.

It is an arithmetic number, because the mean of its divisors is an integer number (5149605124675).

Almost surely, 2^{20411162130421} is an apocalyptic number.

It is an amenable number.

20411162130421 is a deficient number, since it is larger than the sum of its proper divisors (187258368279).

20411162130421 is a wasteful number, since it uses less digits than its factorization.

20411162130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187258368278.

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

Adding to 20411162130421 its reverse (12403126111402), we get a palindrome (32814288241823).

The spelling of 20411162130421 in words is "twenty trillion, four hundred eleven billion, one hundred sixty-two million, one hundred thirty thousand, four hundred twenty-one".