20034281 has 4 divisors (see below), whose sum is σ = 20522964. Its totient is φ = 19545600.

The previous prime is 20034271. The next prime is 20034293. The reversal of 20034281 is 18243002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10368400 + 9665881 = 3220^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 20034281 - 2¹⁰ = 20033257 is a prime.

It is a super-2 number, since 2×20034281² = 802744830373922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20034241) 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, 244280 + ... + 244361.

It is an arithmetic number, because the mean of its divisors is an integer number (5130741).

Almost surely, 2^20034281 is an apocalyptic number.

It is an amenable number.

20034281 is a deficient number, since it is larger than the sum of its proper divisors (488683).

20034281 is an equidigital number, since it uses as much as digits as its factorization.

20034281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488682.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20034281 is about 4475.9670463488. The cubic root of 20034281 is about 271.5967613846.

Adding to 20034281 its reverse (18243002), we get a palindrome (38277283).

The spelling of 20034281 in words is "twenty million, thirty-four thousand, two hundred eighty-one".