20355423 has 16 divisors (see below), whose sum is σ = 29884800. Its totient is φ = 12221280.

The previous prime is 20355373. The next prime is 20355431. The reversal of 20355423 is 32455302.

It is not a de Polignac number, because 20355423 - 2¹³ = 20347231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20355393 and 20355402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 768 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (1867800).

Almost surely, 2^20355423 is an apocalyptic number.

20355423 is a deficient number, since it is larger than the sum of its proper divisors (9529377).

20355423 is a wasteful number, since it uses less digits than its factorization.

20355423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5782.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 20355423 is about 4511.6984606687. The cubic root of 20355423 is about 273.0402736811.

The spelling of 20355423 in words is "twenty million, three hundred fifty-five thousand, four hundred twenty-three".