20411023 has 4 divisors (see below), whose sum is σ = 20536408. Its totient is φ = 20285640.

The previous prime is 20411011. The next prime is 20411029. The reversal of 20411023 is 32011402.

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 20411023 - 2¹³ = 20402831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20410994 and 20411012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411029) 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, 62448 + ... + 62773.

It is an arithmetic number, because the mean of its divisors is an integer number (5134102).

Almost surely, 2^20411023 is an apocalyptic number.

20411023 is a deficient number, since it is larger than the sum of its proper divisors (125385).

20411023 is a wasteful number, since it uses less digits than its factorization.

20411023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125384.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20411023 is about 4517.8560180687. The cubic root of 20411023 is about 273.2886471003.

Adding to 20411023 its reverse (32011402), we get a palindrome (52422425).

The spelling of 20411023 in words is "twenty million, four hundred eleven thousand, twenty-three".