20454423 has 8 divisors (see below), whose sum is σ = 29751936. Its totient is φ = 12396600.

The previous prime is 20454409. The next prime is 20454463. The reversal of 20454423 is 32445402.

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

It is not a de Polignac number, because 20454423 - 2⁶ = 20454359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20454393 and 20454402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309883 + ... + 309948.

It is an arithmetic number, because the mean of its divisors is an integer number (3718992).

Almost surely, 2^20454423 is an apocalyptic number.

20454423 is a deficient number, since it is larger than the sum of its proper divisors (9297513).

20454423 is a wasteful number, since it uses less digits than its factorization.

20454423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619845.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20454423 is about 4522.6566307868. The cubic root of 20454423 is about 273.4822080453.

Adding to 20454423 its reverse (32445402), we get a palindrome (52899825).

The spelling of 20454423 in words is "twenty million, four hundred fifty-four thousand, four hundred twenty-three".