20163375 has 24 divisors (see below), whose sum is σ = 36349872. Its totient is φ = 10753200.

The previous prime is 20163359. The next prime is 20163397. The reversal of 20163375 is 57336102.

It is a happy number.

20163375 is a `hidden beast` number, since 20 + 1 + 633 + 7 + 5 = 666.

It is not a de Polignac number, because 20163375 - 2⁴ = 20163359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7837 + ... + 10086.

It is an arithmetic number, because the mean of its divisors is an integer number (1514578).

Almost surely, 2^20163375 is an apocalyptic number.

20163375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20163375 is a deficient number, since it is larger than the sum of its proper divisors (16186497).

20163375 is a wasteful number, since it uses less digits than its factorization.

20163375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17944 (or 17931 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20163375 is about 4490.3646845217. The cubic root of 20163375 is about 272.1788714963.

Adding to 20163375 its reverse (57336102), we get a palindrome (77499477).

The spelling of 20163375 in words is "twenty million, one hundred sixty-three thousand, three hundred seventy-five".