20135033436521 has 8 divisors (see below), whose sum is σ = 20603434493664. Its totient is φ = 19666638946080.

The previous prime is 20135033436493. The next prime is 20135033436587. The reversal of 20135033436521 is 12563433053102.

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 20135033436521 - 2¹⁰ = 20135033435497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135033456521) 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, 4857986 + ... + 7991876.

It is an arithmetic number, because the mean of its divisors is an integer number (2575429311708).

Almost surely, 2^{20135033436521} is an apocalyptic number.

It is an amenable number.

20135033436521 is a deficient number, since it is larger than the sum of its proper divisors (468401057143).

20135033436521 is a wasteful number, since it uses less digits than its factorization.

20135033436521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283351.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 20135033436521 its reverse (12563433053102), we get a palindrome (32698466489623).

The spelling of 20135033436521 in words is "twenty trillion, one hundred thirty-five billion, thirty-three million, four hundred thirty-six thousand, five hundred twenty-one".