21033310019 has 2 divisors, whose sum is σ = 21033310020. Its totient is φ = 21033310018.

The previous prime is 21033310009. The next prime is 21033310057. The reversal of 21033310019 is 91001333012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033310019 is a prime.

It is a super-2 number, since 2×21033310019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21033309976 and 21033310003.

It is not a weakly prime, because it can be changed into another prime (21033310009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516655009 + 10516655010.

It is an arithmetic number, because the mean of its divisors is an integer number (10516655010).

Almost surely, 2^21033310019 is an apocalyptic number.

21033310019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033310019 is an equidigital number, since it uses as much as digits as its factorization.

21033310019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 21033310019 in words is "twenty-one billion, thirty-three million, three hundred ten thousand, nineteen".