20123634204611 has 8 divisors (see below), whose sum is σ = 23467794991200. Its totient is φ = 17248829317944.

The previous prime is 20123634204599. The next prime is 20123634204629. The reversal of 20123634204611 is 11640243632102.

It is not a de Polignac number, because 20123634204611 - 2⁴² = 15725587693507 is a prime.

It is a super-2 number, since 2×20123634204611² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20123634264611) 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, 29334743396 + ... + 29334744081.

It is an arithmetic number, because the mean of its divisors is an integer number (2933474373900).

Almost surely, 2^{20123634204611} is an apocalyptic number.

20123634204611 is a deficient number, since it is larger than the sum of its proper divisors (3344160786589).

20123634204611 is an frugal number, since it uses more digits than its factorization.

20123634204611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58669487498 (or 58669487484 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 20123634204611 its reverse (11640243632102), we get a palindrome (31763877836713).

The spelling of 20123634204611 in words is "twenty trillion, one hundred twenty-three billion, six hundred thirty-four million, two hundred four thousand, six hundred eleven".