19406668431 has 8 divisors (see below), whose sum is σ = 26117385984. Its totient is φ = 12816864920.

The previous prime is 19406668373. The next prime is 19406668447. The reversal of 19406668431 is 13486660491.

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 19406668431 - 2⁹ = 19406667919 is a prime.

It is a super-2 number, since 2×19406668431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19406668231) 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, 30228135 + ... + 30228776.

It is an arithmetic number, because the mean of its divisors is an integer number (3264673248).

Almost surely, 2^19406668431 is an apocalyptic number.

19406668431 is a deficient number, since it is larger than the sum of its proper divisors (6710717553).

19406668431 is a wasteful number, since it uses less digits than its factorization.

19406668431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60457021.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 19406668431 in words is "nineteen billion, four hundred six million, six hundred sixty-eight thousand, four hundred thirty-one".