21300063 has 8 divisors (see below), whose sum is σ = 28437888. Its totient is φ = 14181144.

The previous prime is 21300061. The next prime is 21300077. The reversal of 21300063 is 36000312.

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

It is not a de Polignac number, because 21300063 - 2¹ = 21300061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300061) 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, 1845 + ... + 6782.

It is an arithmetic number, because the mean of its divisors is an integer number (3554736).

Almost surely, 2^21300063 is an apocalyptic number.

21300063 is a deficient number, since it is larger than the sum of its proper divisors (7137825).

21300063 is an equidigital number, since it uses as much as digits as its factorization.

21300063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 21300063 is about 4615.1991289651. The cubic root of 21300063 is about 277.2002574704.

Adding to 21300063 its reverse (36000312), we get a palindrome (57300375).

The spelling of 21300063 in words is "twenty-one million, three hundred thousand, sixty-three".