20411123 has 4 divisors (see below), whose sum is σ = 20546448. Its totient is φ = 20275800.

The previous prime is 20411107. The next prime is 20411129. The reversal of 20411123 is 32111402.

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 20411123 - 2⁴ = 20411107 is a prime.

It is a super-2 number, since 2×20411123² = 833227884242258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20411098 and 20411107.

It is not an unprimeable number, because it can be changed into a prime (20411129) 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, 67436 + ... + 67737.

It is an arithmetic number, because the mean of its divisors is an integer number (5136612).

Almost surely, 2^20411123 is an apocalyptic number.

20411123 is a deficient number, since it is larger than the sum of its proper divisors (135325).

20411123 is a wasteful number, since it uses less digits than its factorization.

20411123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135324.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20411123 is about 4517.8670852516. The cubic root of 20411123 is about 273.2890934084.

Adding to 20411123 its reverse (32111402), we get a palindrome (52522525).

The spelling of 20411123 in words is "twenty million, four hundred eleven thousand, one hundred twenty-three".