21230645223 has 8 divisors (see below), whose sum is σ = 28310688000. Its totient is φ = 14152182968.

The previous prime is 21230645209. The next prime is 21230645237. The reversal of 21230645223 is 32254603212.

It is an interprime number because it is at equal distance from previous prime (21230645209) and next prime (21230645237).

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 21230645223 - 2¹⁰ = 21230644199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230645273) 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 7 ways as a sum of consecutive naturals, for example, 363423 + ... + 417776.

It is an arithmetic number, because the mean of its divisors is an integer number (3538836000).

Almost surely, 2^21230645223 is an apocalyptic number.

21230645223 is a deficient number, since it is larger than the sum of its proper divisors (7080042777).

21230645223 is an equidigital number, since it uses as much as digits as its factorization.

21230645223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790261.

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 21230645223 in words is "twenty-one billion, two hundred thirty million, six hundred forty-five thousand, two hundred twenty-three".