21019043070079 has 24 divisors (see below), whose sum is σ = 22360221634560. Its totient is φ = 19754527050000.

The previous prime is 21019043070071. The next prime is 21019043070083. The reversal of 21019043070079 is 97007034091012.

It is a happy number.

It is not a de Polignac number, because 21019043070079 - 2³ = 21019043070071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21019043070071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40681042 + ... + 41194480.

It is an arithmetic number, because the mean of its divisors is an integer number (931675901440).

Almost surely, 2^{21019043070079} is an apocalyptic number.

21019043070079 is a deficient number, since it is larger than the sum of its proper divisors (1341178564481).

21019043070079 is a wasteful number, since it uses less digits than its factorization.

21019043070079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514379 (or 514360 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 21019043070079 in words is "twenty-one trillion, nineteen billion, forty-three million, seventy thousand, seventy-nine".