19787269798 has 8 divisors (see below), whose sum is σ = 29914612992. Its totient is φ = 9815732136.

The previous prime is 19787269757. The next prime is 19787269819. The reversal of 19787269798 is 89796278791.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19787269798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38951065 + ... + 38951572.

It is an arithmetic number, because the mean of its divisors is an integer number (3739326624).

Almost surely, 2^19787269798 is an apocalyptic number.

19787269798 is a deficient number, since it is larger than the sum of its proper divisors (10127343194).

19787269798 is a wasteful number, since it uses less digits than its factorization.

19787269798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77902766.

The product of its digits is 192036096, while the sum is 73.

The spelling of 19787269798 in words is "nineteen billion, seven hundred eighty-seven million, two hundred sixty-nine thousand, seven hundred ninety-eight".