21300487223 has 2 divisors, whose sum is σ = 21300487224. Its totient is φ = 21300487222.

The previous prime is 21300487189. The next prime is 21300487237. The reversal of 21300487223 is 32278400312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300487223 - 2²⁰ = 21299438647 is a prime.

It is a super-3 number, since 3×21300487223³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21300487223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300487253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650243611 + 10650243612.

It is an arithmetic number, because the mean of its divisors is an integer number (10650243612).

Almost surely, 2^21300487223 is an apocalyptic number.

21300487223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300487223 is an equidigital number, since it uses as much as digits as its factorization.

21300487223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 21300487223 its reverse (32278400312), we get a palindrome (53578887535).

The spelling of 21300487223 in words is "twenty-one billion, three hundred million, four hundred eighty-seven thousand, two hundred twenty-three".