20003423 has 8 divisors (see below), whose sum is σ = 21968256. Its totient is φ = 18063000.

The previous prime is 20003393. The next prime is 20003443. The reversal of 20003423 is 32430002.

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 20003423 - 2⁸ = 20003167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003398 and 20003407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4361 + ... + 7682.

It is an arithmetic number, because the mean of its divisors is an integer number (2746032).

Almost surely, 2^20003423 is an apocalyptic number.

20003423 is a deficient number, since it is larger than the sum of its proper divisors (1964833).

20003423 is a wasteful number, since it uses less digits than its factorization.

20003423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12205.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20003423 is about 4472.5186416604. The cubic root of 20003423 is about 271.4572465286.

Adding to 20003423 its reverse (32430002), we get a palindrome (52433425).

The spelling of 20003423 in words is "twenty million, three thousand, four hundred twenty-three".