21210073063 has 8 divisors (see below), whose sum is σ = 21261909600. Its totient is φ = 21158292480.

The previous prime is 21210073061. The next prime is 21210073091. The reversal of 21210073063 is 36037001212.

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 21210073063 - 2¹ = 21210073061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210073061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802231 + ... + 828247.

It is an arithmetic number, because the mean of its divisors is an integer number (2657738700).

Almost surely, 2^21210073063 is an apocalyptic number.

21210073063 is a deficient number, since it is larger than the sum of its proper divisors (51836537).

21210073063 is a wasteful number, since it uses less digits than its factorization.

21210073063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27977.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 21210073063 its reverse (36037001212), we get a palindrome (57247074275).

The spelling of 21210073063 in words is "twenty-one billion, two hundred ten million, seventy-three thousand, sixty-three".