20880359 has 4 divisors (see below), whose sum is σ = 20960016. Its totient is φ = 20800704.

The previous prime is 20880347. The next prime is 20880371. The reversal of 20880359 is 95308802.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20880347) and next prime (20880371).

It is a cyclic number.

It is not a de Polignac number, because 20880359 - 2⁸ = 20880103 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 (20880659) 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 3 ways as a sum of consecutive naturals, for example, 39434 + ... + 39959.

It is an arithmetic number, because the mean of its divisors is an integer number (5240004).

Almost surely, 2^20880359 is an apocalyptic number.

20880359 is a deficient number, since it is larger than the sum of its proper divisors (79657).

20880359 is an equidigital number, since it uses as much as digits as its factorization.

20880359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79656.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20880359 is about 4569.5031458573. The cubic root of 20880359 is about 275.3674822687.

The spelling of 20880359 in words is "twenty million, eight hundred eighty thousand, three hundred fifty-nine".