21320210219 has 12 divisors (see below), whose sum is σ = 27055703448. Its totient is φ = 16613150400.

The previous prime is 21320210209. The next prime is 21320210257. The reversal of 21320210219 is 91201202312.

It is a happy number.

It is not a de Polignac number, because 21320210219 - 2¹² = 21320206123 is a prime.

It is a super-2 number, since 2×21320210219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320210194 and 21320210203.

It is not an unprimeable number, because it can be changed into a prime (21320210209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19777022 + ... + 19778099.

It is an arithmetic number, because the mean of its divisors is an integer number (2254641954).

Almost surely, 2^21320210219 is an apocalyptic number.

21320210219 is a deficient number, since it is larger than the sum of its proper divisors (5735493229).

21320210219 is a wasteful number, since it uses less digits than its factorization.

21320210219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39555146 (or 39555139 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21320210219 in words is "twenty-one billion, three hundred twenty million, two hundred ten thousand, two hundred nineteen".