19993125611 has 4 divisors (see below), whose sum is σ = 21045395400. Its totient is φ = 18940855824.

The previous prime is 19993125589. The next prime is 19993125617. The reversal of 19993125611 is 11652139991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11652139991 = 1571 ⋅7417021.

It is a cyclic number.

It is not a de Polignac number, because 19993125611 - 2⁶ = 19993125547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19993125617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526134866 + ... + 526134903.

It is an arithmetic number, because the mean of its divisors is an integer number (5261348850).

Almost surely, 2^19993125611 is an apocalyptic number.

19993125611 is a deficient number, since it is larger than the sum of its proper divisors (1052269789).

19993125611 is a wasteful number, since it uses less digits than its factorization.

19993125611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052269788.

The product of its digits is 131220, while the sum is 47.

The spelling of 19993125611 in words is "nineteen billion, nine hundred ninety-three million, one hundred twenty-five thousand, six hundred eleven".