20165099 has 12 divisors (see below), whose sum is σ = 21570696. Its totient is φ = 18845568.

The previous prime is 20165081. The next prime is 20165129. The reversal of 20165099 is 99056102.

It is not a de Polignac number, because 20165099 - 2²⁰ = 19116523 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 (20167099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29627 + ... + 30299.

It is an arithmetic number, because the mean of its divisors is an integer number (1797558).

Almost surely, 2^20165099 is an apocalyptic number.

20165099 is a deficient number, since it is larger than the sum of its proper divisors (1405597).

20165099 is an equidigital number, since it uses as much as digits as its factorization.

20165099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20165099 is about 4490.5566470094. The cubic root of 20165099 is about 272.1866285145.

The spelling of 20165099 in words is "twenty million, one hundred sixty-five thousand, ninety-nine".