20185135 has 8 divisors (see below), whose sum is σ = 24407856. Its totient is φ = 16024320.

The previous prime is 20185133. The next prime is 20185147. The reversal of 20185135 is 53158102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20185135 - 2¹ = 20185133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14754 + ... + 16063.

It is an arithmetic number, because the mean of its divisors is an integer number (3050982).

Almost surely, 2^20185135 is an apocalyptic number.

20185135 is a deficient number, since it is larger than the sum of its proper divisors (4222721).

20185135 is a wasteful number, since it uses less digits than its factorization.

20185135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30953.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 20185135 is about 4492.7869969541. The cubic root of 20185135 is about 272.2767466948.

The spelling of 20185135 in words is "twenty million, one hundred eighty-five thousand, one hundred thirty-five".