19784783225 has 6 divisors (see below), whose sum is σ = 24533131230. Its totient is φ = 15827826560.

The previous prime is 19784783219. The next prime is 19784783233. The reversal of 19784783225 is 52238748791.

It can be written as a sum of positive squares in 3 ways, for example, as 4570300816 + 15214482409 = 67604^2 + 123347^2 .

It is not a de Polignac number, because 19784783225 - 2²⁴ = 19768006009 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 395695640 + ... + 395695689.

It is an arithmetic number, because the mean of its divisors is an integer number (4088855205).

Almost surely, 2^19784783225 is an apocalyptic number.

It is an amenable number.

19784783225 is a deficient number, since it is larger than the sum of its proper divisors (4748348005).

19784783225 is an equidigital number, since it uses as much as digits as its factorization.

19784783225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791391339 (or 791391334 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 56.

The spelling of 19784783225 in words is "nineteen billion, seven hundred eighty-four million, seven hundred eighty-three thousand, two hundred twenty-five".