21278699328019 has 8 divisors (see below), whose sum is σ = 24360659992928. Its totient is φ = 18207275281920.

The previous prime is 21278699327999. The next prime is 21278699328031. The reversal of 21278699328019 is 91082399687212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21278699328019 - 2⁷ = 21278699327891 is a prime.

It is a super-2 number, since 2×21278699328019² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21278699328049) 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 in 7 ways as a sum of consecutive naturals, for example, 2634150372 + ... + 2634158449.

It is an arithmetic number, because the mean of its divisors is an integer number (3045082499116).

Almost surely, 2^{21278699328019} is an apocalyptic number.

21278699328019 is a deficient number, since it is larger than the sum of its proper divisors (3081960664909).

21278699328019 is an equidigital number, since it uses as much as digits as its factorization.

21278699328019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268309405.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 21278699328019 in words is "twenty-one trillion, two hundred seventy-eight billion, six hundred ninety-nine million, three hundred twenty-eight thousand, nineteen".