20135221710443 has 8 divisors (see below), whose sum is σ = 23011883148000. Its totient is φ = 17258610571200.

The previous prime is 20135221710421. The next prime is 20135221710479. The reversal of 20135221710443 is 34401712253102.

It is a happy number.

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 20135221710443 - 2⁸ = 20135221710187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135221710403) 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, 11712818 + ... + 13321431.

It is an arithmetic number, because the mean of its divisors is an integer number (2876485393500).

Almost surely, 2^{20135221710443} is an apocalyptic number.

20135221710443 is a deficient number, since it is larger than the sum of its proper divisors (2876661437557).

20135221710443 is a wasteful number, since it uses less digits than its factorization.

20135221710443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25149157.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 20135221710443 its reverse (34401712253102), we get a palindrome (54536933963545).

The spelling of 20135221710443 in words is "twenty trillion, one hundred thirty-five billion, two hundred twenty-one million, seven hundred ten thousand, four hundred forty-three".