20342423 has 4 divisors (see below), whose sum is σ = 20629008. Its totient is φ = 20055840.

The previous prime is 20342411. The next prime is 20342429. The reversal of 20342423 is 32424302.

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 20342423 - 2⁶ = 20342359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20342395 and 20342404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342429) 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, 143186 + ... + 143327.

It is an arithmetic number, because the mean of its divisors is an integer number (5157252).

Almost surely, 2^20342423 is an apocalyptic number.

20342423 is a deficient number, since it is larger than the sum of its proper divisors (286585).

20342423 is an equidigital number, since it uses as much as digits as its factorization.

20342423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286584.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20342423 is about 4510.2575314498. The cubic root of 20342423 is about 272.9821355384.

Adding to 20342423 its reverse (32424302), we get a palindrome (52766725).

The spelling of 20342423 in words is "twenty million, three hundred forty-two thousand, four hundred twenty-three".