21010000985 has 8 divisors (see below), whose sum is σ = 25264638720. Its totient is φ = 16772909104.

The previous prime is 21010000967. The next prime is 21010001011. The reversal of 21010000985 is 58900001012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21010000985 - 2¹⁴ = 21009984601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4383827 + ... + 4388616.

It is an arithmetic number, because the mean of its divisors is an integer number (3158079840).

Almost surely, 2^21010000985 is an apocalyptic number.

It is an amenable number.

21010000985 is a deficient number, since it is larger than the sum of its proper divisors (4254637735).

21010000985 is an equidigital number, since it uses as much as digits as its factorization.

21010000985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8772927.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 21010000985 its reverse (58900001012), we get a palindrome (79910001997).

The spelling of 21010000985 in words is "twenty-one billion, ten million, nine hundred eighty-five", and thus it is an aban number.