20799165 has 8 divisors (see below), whose sum is σ = 33278688. Its totient is φ = 11092880.

The previous prime is 20799157. The next prime is 20799169. The reversal of 20799165 is 56199702.

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

It is not a de Polignac number, because 20799165 - 2³ = 20799157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693291 + ... + 693320.

It is an arithmetic number, because the mean of its divisors is an integer number (4159836).

Almost surely, 2^20799165 is an apocalyptic number.

It is an amenable number.

20799165 is a deficient number, since it is larger than the sum of its proper divisors (12479523).

20799165 is a wasteful number, since it uses less digits than its factorization.

20799165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386619.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 20799165 is about 4560.6101565470. The cubic root of 20799165 is about 275.0100932935.

The spelling of 20799165 in words is "twenty million, seven hundred ninety-nine thousand, one hundred sixty-five".