20880617 has 8 divisors (see below), whose sum is σ = 21767616. Its totient is φ = 20010672.

The previous prime is 20880571. The next prime is 20880623. The reversal of 20880617 is 71608802.

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

It is a cyclic number.

It is not a de Polignac number, because 20880617 - 2⁶ = 20880553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20880637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1733 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (2720952).

Almost surely, 2^20880617 is an apocalyptic number.

It is an amenable number.

20880617 is a deficient number, since it is larger than the sum of its proper divisors (886999).

20880617 is an equidigital number, since it uses as much as digits as its factorization.

20880617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 20880617 is about 4569.5313764105. The cubic root of 20880617 is about 275.3686164210.

The spelling of 20880617 in words is "twenty million, eight hundred eighty thousand, six hundred seventeen".