21113430319 has 2 divisors, whose sum is σ = 21113430320. Its totient is φ = 21113430318.

The previous prime is 21113430271. The next prime is 21113430323. The reversal of 21113430319 is 91303431112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113430319 - 2²¹ = 21111333167 is a prime.

It is a super-2 number, since 2×21113430319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113430419) 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, 10556715159 + 10556715160.

It is an arithmetic number, because the mean of its divisors is an integer number (10556715160).

Almost surely, 2^21113430319 is an apocalyptic number.

21113430319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113430319 is an equidigital number, since it uses as much as digits as its factorization.

21113430319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21113430319 in words is "twenty-one billion, one hundred thirteen million, four hundred thirty thousand, three hundred nineteen".