20442175 has 24 divisors (see below), whose sum is σ = 28192640. Its totient is φ = 14601600.

The previous prime is 20442173. The next prime is 20442179. The reversal of 20442175 is 57124402.

It is not a de Polignac number, because 20442175 - 2¹ = 20442173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9061 + ... + 11089.

Almost surely, 2^20442175 is an apocalyptic number.

20442175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20442175 is a deficient number, since it is larger than the sum of its proper divisors (7750465).

20442175 is a wasteful number, since it uses less digits than its factorization.

20442175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083 (or 2078 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20442175 is about 4521.3023566225. The cubic root of 20442175 is about 273.4276105811.

Adding to 20442175 its reverse (57124402), we get a palindrome (77566577).

The spelling of 20442175 in words is "twenty million, four hundred forty-two thousand, one hundred seventy-five".