20621442536411 has 8 divisors (see below), whose sum is σ = 20779143272448. Its totient is φ = 20463746121000.

The previous prime is 20621442536407. The next prime is 20621442536417. The reversal of 20621442536411 is 11463524412602.

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 20621442536411 - 2² = 20621442536407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20621442536417) 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 7 ways as a sum of consecutive naturals, for example, 8849606 + ... + 10934276.

It is an arithmetic number, because the mean of its divisors is an integer number (2597392909056).

Almost surely, 2^{20621442536411} is an apocalyptic number.

20621442536411 is a deficient number, since it is larger than the sum of its proper divisors (157700736037).

20621442536411 is a wasteful number, since it uses less digits than its factorization.

20621442536411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160313.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 20621442536411 in words is "twenty trillion, six hundred twenty-one billion, four hundred forty-two million, five hundred thirty-six thousand, four hundred eleven".