20185975 has 12 divisors (see below), whose sum is σ = 25147944. Its totient is φ = 16073120.

The previous prime is 20185969. The next prime is 20185993. The reversal of 20185975 is 57958102.

It is not a de Polignac number, because 20185975 - 2³ = 20185967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3897 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (2095662).

Almost surely, 2^20185975 is an apocalyptic number.

20185975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20185975 is a deficient number, since it is larger than the sum of its proper divisors (4961969).

20185975 is a wasteful number, since it uses less digits than its factorization.

20185975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 20185975 is about 4492.8804791581. The cubic root of 20185975 is about 272.2805235549.

The spelling of 20185975 in words is "twenty million, one hundred eighty-five thousand, nine hundred seventy-five".