21010281417 has 16 divisors (see below), whose sum is σ = 31162697280. Its totient is φ = 13990494816.

The previous prime is 21010281379. The next prime is 21010281433. The reversal of 21010281417 is 71418201012.

21010281417 is a `hidden beast` number, since 210 + 10 + 28 + 1 + 417 = 666.

It is not a de Polignac number, because 21010281417 - 2⁷ = 21010281289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21010281437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430863 + ... + 477140.

It is an arithmetic number, because the mean of its divisors is an integer number (1947668580).

Almost surely, 2^21010281417 is an apocalyptic number.

21010281417 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21010281417 is a deficient number, since it is larger than the sum of its proper divisors (10152415863).

21010281417 is an equidigital number, since it uses as much as digits as its factorization.

21010281417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908869 (or 908863 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 21010281417 its reverse (71418201012), we get a palindrome (92428482429).

The spelling of 21010281417 in words is "twenty-one billion, ten million, two hundred eighty-one thousand, four hundred seventeen".