20339423 has 4 divisors (see below), whose sum is σ = 21904008. Its totient is φ = 18774840.

The previous prime is 20339401. The next prime is 20339447. The reversal of 20339423 is 32493302.

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 20339423 - 2⁸ = 20339167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20339392 and 20339401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339323) 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, 782273 + ... + 782298.

It is an arithmetic number, because the mean of its divisors is an integer number (5476002).

Almost surely, 2^20339423 is an apocalyptic number.

20339423 is a deficient number, since it is larger than the sum of its proper divisors (1564585).

20339423 is a wasteful number, since it uses less digits than its factorization.

20339423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564584.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 20339423 is about 4509.9249439431. The cubic root of 20339423 is about 272.9687155267.

The spelling of 20339423 in words is "twenty million, three hundred thirty-nine thousand, four hundred twenty-three".