20539423 has 8 divisors (see below), whose sum is σ = 21466368. Its totient is φ = 19632984.

The previous prime is 20539411. The next prime is 20539427. The reversal of 20539423 is 32493502.

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 20539423 - 2⁹ = 20538911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20539391 and 20539400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20539427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061 + ... + 7102.

It is an arithmetic number, because the mean of its divisors is an integer number (2683296).

Almost surely, 2^20539423 is an apocalyptic number.

20539423 is a deficient number, since it is larger than the sum of its proper divisors (926945).

20539423 is a wasteful number, since it uses less digits than its factorization.

20539423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20539423 is about 4532.0440200863. The cubic root of 20539423 is about 273.8605102773.

It can be divided in two parts, 2053 and 9423, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 20539423 in words is "twenty million, five hundred thirty-nine thousand, four hundred twenty-three".