21329233019 has 2 divisors, whose sum is σ = 21329233020. Its totient is φ = 21329233018.

The previous prime is 21329232983. The next prime is 21329233031. The reversal of 21329233019 is 91033292312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21329233019 is a prime.

It is a super-2 number, since 2×21329233019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21329233019.

It is not a weakly prime, because it can be changed into another prime (21329233319) 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, 10664616509 + 10664616510.

It is an arithmetic number, because the mean of its divisors is an integer number (10664616510).

Almost surely, 2^21329233019 is an apocalyptic number.

21329233019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21329233019 is an equidigital number, since it uses as much as digits as its factorization.

21329233019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 21329233019 in words is "twenty-one billion, three hundred twenty-nine million, two hundred thirty-three thousand, nineteen".