20452423 has 4 divisors (see below), whose sum is σ = 20466360. Its totient is φ = 20438488.

The previous prime is 20452363. The next prime is 20452427. The reversal of 20452423 is 32425402.

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 20452423 - 2⁹ = 20451911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20452394 and 20452403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452427) 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, 4468 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (5116590).

Almost surely, 2^20452423 is an apocalyptic number.

20452423 is a deficient number, since it is larger than the sum of its proper divisors (13937).

20452423 is a wasteful number, since it uses less digits than its factorization.

20452423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13936.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20452423 is about 4522.4355164004. The cubic root of 20452423 is about 273.4732942072.

Adding to 20452423 its reverse (32425402), we get a palindrome (52877825).

The spelling of 20452423 in words is "twenty million, four hundred fifty-two thousand, four hundred twenty-three".