21160085 has 8 divisors (see below), whose sum is σ = 25982880. Its totient is φ = 16534224.

The previous prime is 21160081. The next prime is 21160123. The reversal of 21160085 is 58006112.

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 21160085 - 2² = 21160081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21160085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48995 + ... + 49424.

It is an arithmetic number, because the mean of its divisors is an integer number (3247860).

Almost surely, 2^21160085 is an apocalyptic number.

It is an amenable number.

21160085 is a deficient number, since it is larger than the sum of its proper divisors (4822795).

21160085 is an equidigital number, since it uses as much as digits as its factorization.

21160085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98467.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 21160085 is about 4600.0092391212. The cubic root of 21160085 is about 276.5916951421.

Adding to 21160085 its reverse (58006112), we get a palindrome (79166197).

The spelling of 21160085 in words is "twenty-one million, one hundred sixty thousand, eighty-five".