19675097945 has 4 divisors (see below), whose sum is σ = 23610117540. Its totient is φ = 15740078352.

The previous prime is 19675097941. The next prime is 19675097957. The reversal of 19675097945 is 54979057691.

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 7845707776 + 11829390169 = 88576^2 + 108763^2 .

It is a cyclic number.

It is not a de Polignac number, because 19675097945 - 2² = 19675097941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19675097941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967509790 + ... + 1967509799.

It is an arithmetic number, because the mean of its divisors is an integer number (5902529385).

Almost surely, 2^19675097945 is an apocalyptic number.

It is an amenable number.

19675097945 is a deficient number, since it is larger than the sum of its proper divisors (3935019595).

19675097945 is an equidigital number, since it uses as much as digits as its factorization.

19675097945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935019594.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 19675097945 in words is "nineteen billion, six hundred seventy-five million, ninety-seven thousand, nine hundred forty-five".