20443411121213 has 8 divisors (see below), whose sum is σ = 20898656238936. Its totient is φ = 19992040430400.

The previous prime is 20443411121209. The next prime is 20443411121227. The reversal of 20443411121213 is 31212111434402.

It can be written as a sum of positive squares in 4 ways, for example, as 956245382884 + 19487165738329 = 977878^2 + 4414427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20443411121213 - 2² = 20443411121209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443411127213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968596058 + ... + 968617163.

It is an arithmetic number, because the mean of its divisors is an integer number (2612332029867).

Almost surely, 2^{20443411121213} is an apocalyptic number.

It is an amenable number.

20443411121213 is a deficient number, since it is larger than the sum of its proper divisors (455245117723).

20443411121213 is a wasteful number, since it uses less digits than its factorization.

20443411121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937213455.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 20443411121213 its reverse (31212111434402), we get a palindrome (51655522555615).

The spelling of 20443411121213 in words is "twenty trillion, four hundred forty-three billion, four hundred eleven million, one hundred twenty-one thousand, two hundred thirteen".