21300988363 has 2 divisors, whose sum is σ = 21300988364. Its totient is φ = 21300988362.

The previous prime is 21300988361. The next prime is 21300988381. The reversal of 21300988363 is 36388900312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21300988363 - 2¹ = 21300988361 is a prime.

It is a super-2 number, since 2×21300988363² (a number of 21 digits) contains 22 as substring.

Together with 21300988361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21300988361) 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 as a sum of consecutive naturals, namely, 10650494181 + 10650494182.

It is an arithmetic number, because the mean of its divisors is an integer number (10650494182).

Almost surely, 2^21300988363 is an apocalyptic number.

21300988363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300988363 is an equidigital number, since it uses as much as digits as its factorization.

21300988363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 21300988363 in words is "twenty-one billion, three hundred million, nine hundred eighty-eight thousand, three hundred sixty-three".