20559423 has 8 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 13695704.

The previous prime is 20559421. The next prime is 20559433. The reversal of 20559423 is 32495502.

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 20559423 - 2¹ = 20559421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20559421) 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, 5290 + ... + 8312.

It is an arithmetic number, because the mean of its divisors is an integer number (3429216).

Almost surely, 2^20559423 is an apocalyptic number.

20559423 is a deficient number, since it is larger than the sum of its proper divisors (6874305).

20559423 is a wasteful number, since it uses less digits than its factorization.

20559423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20559423 is about 4534.2499931080. The cubic root of 20559423 is about 273.9493708291.

The spelling of 20559423 in words is "twenty million, five hundred fifty-nine thousand, four hundred twenty-three".