19749896907 has 8 divisors (see below), whose sum is σ = 28358826384. Its totient is φ = 12153782688.

The previous prime is 19749896891. The next prime is 19749896951. The reversal of 19749896907 is 70969894791.

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

It is not a de Polignac number, because 19749896907 - 2⁴ = 19749896891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19749896987) 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 7 ways as a sum of consecutive naturals, for example, 253203768 + ... + 253203845.

It is an arithmetic number, because the mean of its divisors is an integer number (3544853298).

Almost surely, 2^19749896907 is an apocalyptic number.

19749896907 is a deficient number, since it is larger than the sum of its proper divisors (8608929477).

19749896907 is a wasteful number, since it uses less digits than its factorization.

19749896907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506407629.

The product of its (nonzero) digits is 61725888, while the sum is 69.

The spelling of 19749896907 in words is "nineteen billion, seven hundred forty-nine million, eight hundred ninety-six thousand, nine hundred seven".