19909774403 has 8 divisors (see below), whose sum is σ = 20064704400. Its totient is φ = 19755128800.

The previous prime is 19909774399. The next prime is 19909774411. The reversal of 19909774403 is 30447790991.

It is a happy number.

It is a Cunningham number, because it is equal to 141102²-1.

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 19909774403 - 2² = 19909774399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19909774603) 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, 70553 + ... + 211653.

It is an arithmetic number, because the mean of its divisors is an integer number (2508088050).

Almost surely, 2^19909774403 is an apocalyptic number.

19909774403 is a deficient number, since it is larger than the sum of its proper divisors (154929997).

19909774403 is a wasteful number, since it uses less digits than its factorization.

19909774403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142197.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 19909774403 in words is "nineteen billion, nine hundred nine million, seven hundred seventy-four thousand, four hundred three".