20123411205 has 32 divisors (see below), whose sum is σ = 32506809984. Its totient is φ = 10629513216.

The previous prime is 20123411179. The next prime is 20123411213. The reversal of 20123411205 is 50211432102.

It is not a de Polignac number, because 20123411205 - 2¹¹ = 20123409157 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2754117 + ... + 2761413.

It is an arithmetic number, because the mean of its divisors is an integer number (1015837812).

Almost surely, 2^20123411205 is an apocalyptic number.

It is an amenable number.

20123411205 is a deficient number, since it is larger than the sum of its proper divisors (12383398779).

20123411205 is a wasteful number, since it uses less digits than its factorization.

20123411205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20123411205 its reverse (50211432102), we get a palindrome (70334843307).

The spelling of 20123411205 in words is "twenty billion, one hundred twenty-three million, four hundred eleven thousand, two hundred five".