21522014203 has 4 divisors (see below), whose sum is σ = 21524142880. Its totient is φ = 21519885528.

The previous prime is 21522014197. The next prime is 21522014219. The reversal of 21522014203 is 30241022512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21522014203 - 2²¹ = 21519917051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21522014243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049100 + ... + 1069417.

It is an arithmetic number, because the mean of its divisors is an integer number (5381035720).

Almost surely, 2^21522014203 is an apocalyptic number.

21522014203 is a deficient number, since it is larger than the sum of its proper divisors (2128677).

21522014203 is a wasteful number, since it uses less digits than its factorization.

21522014203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128676.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21522014203 its reverse (30241022512), we get a palindrome (51763036715).

The spelling of 21522014203 in words is "twenty-one billion, five hundred twenty-two million, fourteen thousand, two hundred three".