20423205110411 has 4 divisors (see below), whose sum is σ = 20439986709912. Its totient is φ = 20406423510912.

The previous prime is 20423205110401. The next prime is 20423205110423. The reversal of 20423205110411 is 11401150232402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423205110411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423205110401) 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, 8390797925 + ... + 8390800358.

It is an arithmetic number, because the mean of its divisors is an integer number (5109996677478).

Almost surely, 2^{20423205110411} is an apocalyptic number.

20423205110411 is a deficient number, since it is larger than the sum of its proper divisors (16781599501).

20423205110411 is a wasteful number, since it uses less digits than its factorization.

20423205110411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16781599500.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 20423205110411 its reverse (11401150232402), we get a palindrome (31824355342813).

The spelling of 20423205110411 in words is "twenty trillion, four hundred twenty-three billion, two hundred five million, one hundred ten thousand, four hundred eleven".