20881295 has 4 divisors (see below), whose sum is σ = 25057560. Its totient is φ = 16705032.

The previous prime is 20881271. The next prime is 20881297. The reversal of 20881295 is 59218802.

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

It is a cyclic number.

It is not a de Polignac number, because 20881295 - 2¹⁰ = 20880271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20881297) 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, 2088125 + ... + 2088134.

It is an arithmetic number, because the mean of its divisors is an integer number (6264390).

Almost surely, 2^20881295 is an apocalyptic number.

20881295 is a deficient number, since it is larger than the sum of its proper divisors (4176265).

20881295 is an equidigital number, since it uses as much as digits as its factorization.

20881295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176264.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 20881295 is about 4569.6055628468. The cubic root of 20881295 is about 275.3715968230.

The spelling of 20881295 in words is "twenty million, eight hundred eighty-one thousand, two hundred ninety-five".