19597643338 has 16 divisors (see below), whose sum is σ = 36180264960. Its totient is φ = 7752913776.

The previous prime is 19597643323. The next prime is 19597643353. The reversal of 19597643338 is 83334679591.

It is an interprime number because it is at equal distance from previous prime (19597643323) and next prime (19597643353).

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 7 ways as a sum of consecutive naturals, for example, 53839498 + ... + 53839861.

It is an arithmetic number, because the mean of its divisors is an integer number (2261266560).

Almost surely, 2^19597643338 is an apocalyptic number.

19597643338 is a deficient number, since it is larger than the sum of its proper divisors (16582621622).

19597643338 is a wasteful number, since it uses less digits than its factorization.

19597643338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107679381.

The product of its digits is 14696640, while the sum is 58.

The spelling of 19597643338 in words is "nineteen billion, five hundred ninety-seven million, six hundred forty-three thousand, three hundred thirty-eight".