21650063 has 8 divisors (see below), whose sum is σ = 22873200. Its totient is φ = 20435328.

The previous prime is 21650021. The next prime is 21650087. The reversal of 21650063 is 36005612.

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 21650063 - 2¹⁴ = 21633679 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 (21650093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3623 + ... + 7511.

It is an arithmetic number, because the mean of its divisors is an integer number (2859150).

Almost surely, 2^21650063 is an apocalyptic number.

21650063 is a deficient number, since it is larger than the sum of its proper divisors (1223137).

21650063 is a wasteful number, since it uses less digits than its factorization.

21650063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 21650063 is about 4652.9628195377. The cubic root of 21650063 is about 278.7103231347.

Adding to 21650063 its reverse (36005612), we get a palindrome (57655675).

The spelling of 21650063 in words is "twenty-one million, six hundred fifty thousand, sixty-three".