20412323 has 4 divisors (see below), whose sum is σ = 20421360. Its totient is φ = 20403288.

The previous prime is 20412319. The next prime is 20412349. The reversal of 20412323 is 32321402.

It is a Cunningham number, because it is equal to 4518²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20412323 - 2² = 20412319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412923) 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, 2258 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (5105340).

Almost surely, 2^20412323 is an apocalyptic number.

20412323 is a deficient number, since it is larger than the sum of its proper divisors (9037).

20412323 is an equidigital number, since it uses as much as digits as its factorization.

20412323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20412323 is about 4517.9998893316. Note that the first 3 decimals coincide. The cubic root of 20412323 is about 273.2944489930.

Adding to 20412323 its reverse (32321402), we get a palindrome (52733725).

The spelling of 20412323 in words is "twenty million, four hundred twelve thousand, three hundred twenty-three".