20135635165201 has 4 divisors (see below), whose sum is σ = 21011097563712. Its totient is φ = 19260172766692.

The previous prime is 20135635165199. The next prime is 20135635165211. The reversal of 20135635165201 is 10256153653102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20135635165201 - 2¹ = 20135635165199 is a prime.

It is a super-2 number, since 2×20135635165201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135635165211) 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, 437731199221 + ... + 437731199266.

It is an arithmetic number, because the mean of its divisors is an integer number (5252774390928).

Almost surely, 2^{20135635165201} is an apocalyptic number.

It is an amenable number.

20135635165201 is a deficient number, since it is larger than the sum of its proper divisors (875462398511).

20135635165201 is an equidigital number, since it uses as much as digits as its factorization.

20135635165201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875462398510.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 20135635165201 in words is "twenty trillion, one hundred thirty-five billion, six hundred thirty-five million, one hundred sixty-five thousand, two hundred one".