19953820079 has 8 divisors (see below), whose sum is σ = 20220000000. Its totient is φ = 19687980312.

The previous prime is 19953820067. The next prime is 19953820109. The reversal of 19953820079 is 97002835991.

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 19953820079 - 2²⁴ = 19937042863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19953820079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19953822079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34172 + ... + 202670.

It is an arithmetic number, because the mean of its divisors is an integer number (2527500000).

Almost surely, 2^19953820079 is an apocalyptic number.

19953820079 is a deficient number, since it is larger than the sum of its proper divisors (266179921).

19953820079 is a wasteful number, since it uses less digits than its factorization.

19953820079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170077.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 19953820079 in words is "nineteen billion, nine hundred fifty-three million, eight hundred twenty thousand, seventy-nine".