20413423 has 8 divisors (see below), whose sum is σ = 20804256. Its totient is φ = 20025600.

The previous prime is 20413409. The next prime is 20413441. The reversal of 20413423 is 32431402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20413423 - 2¹⁷ = 20282351 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20413423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16515 + ... + 17707.

It is an arithmetic number, because the mean of its divisors is an integer number (2600532).

Almost surely, 2^20413423 is an apocalyptic number.

20413423 is a deficient number, since it is larger than the sum of its proper divisors (390833).

20413423 is a wasteful number, since it uses less digits than its factorization.

20413423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20413423 is about 4518.1216229756. The cubic root of 20413423 is about 273.2993580945.

Adding to 20413423 its reverse (32431402), we get a palindrome (52844825).

The spelling of 20413423 in words is "twenty million, four hundred thirteen thousand, four hundred twenty-three".