21010327 has 8 divisors (see below), whose sum is σ = 23178960. Its totient is φ = 18920640.

The previous prime is 21010321. The next prime is 21010337. The reversal of 21010327 is 72301012.

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 21010327 - 2¹¹ = 21008279 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010321) 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, 19177 + ... + 20242.

It is an arithmetic number, because the mean of its divisors is an integer number (2897370).

Almost surely, 2^21010327 is an apocalyptic number.

21010327 is a deficient number, since it is larger than the sum of its proper divisors (2168633).

21010327 is a wasteful number, since it uses less digits than its factorization.

21010327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39473.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 21010327 is about 4583.7023245407. The cubic root of 21010327 is about 275.9376346872.

Adding to 21010327 its reverse (72301012), we get a palindrome (93311339).

The spelling of 21010327 in words is "twenty-one million, ten thousand, three hundred twenty-seven".