20879365 has 8 divisors (see below), whose sum is σ = 26982648. Its totient is φ = 15418560.

The previous prime is 20879351. The next prime is 20879389. The reversal of 20879365 is 56397802.

It can be written as a sum of positive squares in 4 ways, for example, as 1085764 + 19793601 = 1042^2 + 4449^2 .

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

It is not a de Polignac number, because 20879365 - 2²¹ = 18782213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160546 + ... + 160675.

It is an arithmetic number, because the mean of its divisors is an integer number (3372831).

Almost surely, 2^20879365 is an apocalyptic number.

It is an amenable number.

20879365 is a deficient number, since it is larger than the sum of its proper divisors (6103283).

20879365 is a wasteful number, since it uses less digits than its factorization.

20879365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321239.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20879365 is about 4569.3943800027. The cubic root of 20879365 is about 275.3631126181.

The spelling of 20879365 in words is "twenty million, eight hundred seventy-nine thousand, three hundred sixty-five".