19819388294 has 16 divisors (see below), whose sum is σ = 30339860256. Its totient is φ = 9707880000.

The previous prime is 19819388293. The next prime is 19819388297. The reversal of 19819388294 is 49288391891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19819388293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422207 + ... + 466794.

It is an arithmetic number, because the mean of its divisors is an integer number (1896241266).

Almost surely, 2^19819388294 is an apocalyptic number.

19819388294 is a deficient number, since it is larger than the sum of its proper divisors (10520471962).

19819388294 is a wasteful number, since it uses less digits than its factorization.

19819388294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889231.

The product of its digits is 8957952, while the sum is 62.

The spelling of 19819388294 in words is "nineteen billion, eight hundred nineteen million, three hundred eighty-eight thousand, two hundred ninety-four".