20524123 has 4 divisors (see below), whose sum is σ = 21604360. Its totient is φ = 19443888.

The previous prime is 20524111. The next prime is 20524129. The reversal of 20524123 is 32142502.

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 20524123 - 2⁹ = 20523611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1080217 = 20524123 / (2 + 0 + 5 + 2 + 4 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20524123.

It is not an unprimeable number, because it can be changed into a prime (20524129) 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 3 ways as a sum of consecutive naturals, for example, 540090 + ... + 540127.

It is an arithmetic number, because the mean of its divisors is an integer number (5401090).

Almost surely, 2^20524123 is an apocalyptic number.

20524123 is a deficient number, since it is larger than the sum of its proper divisors (1080237).

20524123 is a wasteful number, since it uses less digits than its factorization.

20524123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080236.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20524123 is about 4530.3557255474. The cubic root of 20524123 is about 273.7924930040.

Adding to 20524123 its reverse (32142502), we get a palindrome (52666625).

The spelling of 20524123 in words is "twenty million, five hundred twenty-four thousand, one hundred twenty-three".