20165315 has 16 divisors (see below), whose sum is σ = 26062560. Its totient is φ = 14922240.

The previous prime is 20165309. The next prime is 20165339. The reversal of 20165315 is 51356102.

It is not a de Polignac number, because 20165315 - 2¹⁸ = 19903171 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 3005 + ... + 7025.

It is an arithmetic number, because the mean of its divisors is an integer number (1628910).

Almost surely, 2^20165315 is an apocalyptic number.

20165315 is a deficient number, since it is larger than the sum of its proper divisors (5897245).

20165315 is a wasteful number, since it uses less digits than its factorization.

20165315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102.

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

The square root of 20165315 is about 4490.5806974154. The cubic root of 20165315 is about 272.1876003603.

The spelling of 20165315 in words is "twenty million, one hundred sixty-five thousand, three hundred fifteen".