20165135 has 8 divisors (see below), whose sum is σ = 25250400. Its totient is φ = 15430624.

The previous prime is 20165129. The next prime is 20165141. The reversal of 20165135 is 53156102.

It is an interprime number because it is at equal distance from previous prime (20165129) and next prime (20165141).

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

It is a cyclic number.

It is not a de Polignac number, because 20165135 - 2¹⁸ = 19902991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20165135.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 87560 + ... + 87789.

It is an arithmetic number, because the mean of its divisors is an integer number (3156300).

Almost surely, 2^20165135 is an apocalyptic number.

20165135 is a deficient number, since it is larger than the sum of its proper divisors (5085265).

20165135 is a wasteful number, since it uses less digits than its factorization.

20165135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175377.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 20165135 is about 4490.5606554193. The cubic root of 20165135 is about 272.1867904893.

The spelling of 20165135 in words is "twenty million, one hundred sixty-five thousand, one hundred thirty-five".