20423075 has 12 divisors (see below), whose sum is σ = 26010240. Its totient is φ = 15896160.

The previous prime is 20423071. The next prime is 20423077. The reversal of 20423075 is 57032402.

It is not a de Polignac number, because 20423075 - 2² = 20423071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20423075.

It is not an unprimeable number, because it can be changed into a prime (20423071) 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 11 ways as a sum of consecutive naturals, for example, 10115 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (2167520).

Almost surely, 2^20423075 is an apocalyptic number.

20423075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20423075 is a deficient number, since it is larger than the sum of its proper divisors (5587165).

20423075 is a wasteful number, since it uses less digits than its factorization.

20423075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22126 (or 22121 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20423075 is about 4519.1896397474. The cubic root of 20423075 is about 273.3424256675.

Adding to 20423075 its reverse (57032402), we get a palindrome (77455477).

The spelling of 20423075 in words is "twenty million, four hundred twenty-three thousand, seventy-five".