19194991828 has 24 divisors (see below), whose sum is σ = 33700867200. Its totient is φ = 9566208288.

The previous prime is 19194991733. The next prime is 19194991867. The reversal of 19194991828 is 82819949191.

It is a super-2 number, since 2×19194991828² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870593 + ... + 2877271.

It is an arithmetic number, because the mean of its divisors is an integer number (1404202800).

Almost surely, 2^19194991828 is an apocalyptic number.

It is an amenable number.

19194991828 is a deficient number, since it is larger than the sum of its proper divisors (14505875372).

19194991828 is a wasteful number, since it uses less digits than its factorization.

19194991828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919 (or 8917 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 61.

The spelling of 19194991828 in words is "nineteen billion, one hundred ninety-four million, nine hundred ninety-one thousand, eight hundred twenty-eight".