20155235 has 4 divisors (see below), whose sum is σ = 24186288. Its totient is φ = 16124184.

The previous prime is 20155169. The next prime is 20155249. The reversal of 20155235 is 53255102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20155235 - 2¹⁴ = 20138851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20155235.

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 3 ways as a sum of consecutive naturals, for example, 2015519 + ... + 2015528.

It is an arithmetic number, because the mean of its divisors is an integer number (6046572).

Almost surely, 2^20155235 is an apocalyptic number.

20155235 is a deficient number, since it is larger than the sum of its proper divisors (4031053).

20155235 is an equidigital number, since it uses as much as digits as its factorization.

20155235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031052.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 20155235 is about 4489.4582078465. The cubic root of 20155235 is about 272.1422401582.

The spelling of 20155235 in words is "twenty million, one hundred fifty-five thousand, two hundred thirty-five".