20881153 has 4 divisors (see below), whose sum is σ = 21192880. Its totient is φ = 20569428.

The previous prime is 20881141. The next prime is 20881163. The reversal of 20881153 is 35118802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20881153 - 2⁵ = 20881121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20881123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155763 + ... + 155896.

It is an arithmetic number, because the mean of its divisors is an integer number (5298220).

Almost surely, 2^20881153 is an apocalyptic number.

It is an amenable number.

20881153 is a deficient number, since it is larger than the sum of its proper divisors (311727).

20881153 is an equidigital number, since it uses as much as digits as its factorization.

20881153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311726.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 20881153 is about 4569.5900253743. The cubic root of 20881153 is about 275.3709726144.

Adding to 20881153 its reverse (35118802), we get a palindrome (55999955).

The spelling of 20881153 in words is "twenty million, eight hundred eighty-one thousand, one hundred fifty-three".