20281295 has 8 divisors (see below), whose sum is σ = 25176960. Its totient is φ = 15665440.

The previous prime is 20281279. The next prime is 20281297. The reversal of 20281295 is 59218202.

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

It is not a de Polignac number, because 20281295 - 2⁴ = 20281279 is a prime.

It is a super-2 number, since 2×20281295² = 822661853754050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20281297) 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 7 ways as a sum of consecutive naturals, for example, 69791 + ... + 70080.

It is an arithmetic number, because the mean of its divisors is an integer number (3147120).

Almost surely, 2^20281295 is an apocalyptic number.

20281295 is a deficient number, since it is larger than the sum of its proper divisors (4895665).

20281295 is a wasteful number, since it uses less digits than its factorization.

20281295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139905.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20281295 is about 4503.4758798066. The cubic root of 20281295 is about 272.7084284791.

Adding to 20281295 its reverse (59218202), we get a palindrome (79499497).

It can be divided in two parts, 20281 and 295, that multiplied together give a palindrome (5982895).

The spelling of 20281295 in words is "twenty million, two hundred eighty-one thousand, two hundred ninety-five".