19669809406 has 8 divisors (see below), whose sum is σ = 31774307544. Its totient is φ = 9078373560.

The previous prime is 19669809389. The next prime is 19669809431. The reversal of 19669809406 is 60490896691.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378265540 + ... + 378265591.

It is an arithmetic number, because the mean of its divisors is an integer number (3971788443).

Almost surely, 2^19669809406 is an apocalyptic number.

19669809406 is a deficient number, since it is larger than the sum of its proper divisors (12104498138).

19669809406 is a wasteful number, since it uses less digits than its factorization.

19669809406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756531146.

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 19669809406 in words is "nineteen billion, six hundred sixty-nine million, eight hundred nine thousand, four hundred six".