19440097813 has 8 divisors (see below), whose sum is σ = 19972356768. Its totient is φ = 18908199504.

The previous prime is 19440097801. The next prime is 19440097819. The reversal of 19440097813 is 31879004491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19440097813 - 2²⁵ = 19406543381 is a prime.

It is a super-3 number, since 3×19440097813³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19440097819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20970 + ... + 198292.

It is an arithmetic number, because the mean of its divisors is an integer number (2496544596).

Almost surely, 2^19440097813 is an apocalyptic number.

It is an amenable number.

19440097813 is a deficient number, since it is larger than the sum of its proper divisors (532258955).

19440097813 is a wasteful number, since it uses less digits than its factorization.

19440097813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180323.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 19440097813 in words is "nineteen billion, four hundred forty million, ninety-seven thousand, eight hundred thirteen".