20281359 has 8 divisors (see below), whose sum is σ = 30904960. Its totient is φ = 11589336.

The previous prime is 20281333. The next prime is 20281367. The reversal of 20281359 is 95318202.

It is a happy number.

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

It is not a de Polignac number, because 20281359 - 2²¹ = 18184207 is a prime.

It is a super-2 number, since 2×20281359² = 822667045773762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20281319) 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 7 ways as a sum of consecutive naturals, for example, 482869 + ... + 482910.

It is an arithmetic number, because the mean of its divisors is an integer number (3863120).

Almost surely, 2^20281359 is an apocalyptic number.

20281359 is a deficient number, since it is larger than the sum of its proper divisors (10623601).

20281359 is an equidigital number, since it uses as much as digits as its factorization.

20281359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965789.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20281359 is about 4503.4829854236. The cubic root of 20281359 is about 272.7087153333.

The spelling of 20281359 in words is "twenty million, two hundred eighty-one thousand, three hundred fifty-nine".