20135323035511 has 4 divisors (see below), whose sum is σ = 20515234790952. Its totient is φ = 19755411280072.

The previous prime is 20135323035463. The next prime is 20135323035571. The reversal of 20135323035511 is 11553032353102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20135323035511 - 2²³ = 20135314646903 is a prime.

It is a super-2 number, since 2×20135323035511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135323035571) 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, 189955877641 + ... + 189955877746.

It is an arithmetic number, because the mean of its divisors is an integer number (5128808697738).

Almost surely, 2^{20135323035511} is an apocalyptic number.

20135323035511 is a deficient number, since it is larger than the sum of its proper divisors (379911755441).

20135323035511 is an equidigital number, since it uses as much as digits as its factorization.

20135323035511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379911755440.

The product of its (nonzero) digits is 40500, while the sum is 34.

Adding to 20135323035511 its reverse (11553032353102), we get a palindrome (31688355388613).

The spelling of 20135323035511 in words is "twenty trillion, one hundred thirty-five billion, three hundred twenty-three million, thirty-five thousand, five hundred eleven".