19431734968 has 24 divisors (see below), whose sum is σ = 36953983080. Its totient is φ = 9577386560.

The previous prime is 19431734957. The next prime is 19431734981. The reversal of 19431734968 is 86943713491.

It is a super-2 number, since 2×19431734968² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3319308 + ... + 3325156.

It is an arithmetic number, because the mean of its divisors is an integer number (1539749295).

Almost surely, 2^19431734968 is an apocalyptic number.

It is an amenable number.

19431734968 is a deficient number, since it is larger than the sum of its proper divisors (17522248112).

19431734968 is an frugal number, since it uses more digits than its factorization.

19431734968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11775 (or 5922 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 55.

The spelling of 19431734968 in words is "nineteen billion, four hundred thirty-one million, seven hundred thirty-four thousand, nine hundred sixty-eight".