19700252785 has 4 divisors (see below), whose sum is σ = 23640303348. Its totient is φ = 15760202224.

The previous prime is 19700252777. The next prime is 19700252807. The reversal of 19700252785 is 58725200791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6769833841 + 12930418944 = 82279^2 + 113712^2 .

It is a cyclic number.

It is not a de Polignac number, because 19700252785 - 2³ = 19700252777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970025274 + ... + 1970025283.

It is an arithmetic number, because the mean of its divisors is an integer number (5910075837).

Almost surely, 2^19700252785 is an apocalyptic number.

It is an amenable number.

19700252785 is a deficient number, since it is larger than the sum of its proper divisors (3940050563).

19700252785 is an equidigital number, since it uses as much as digits as its factorization.

19700252785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940050562.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 19700252785 in words is "nineteen billion, seven hundred million, two hundred fifty-two thousand, seven hundred eighty-five".