19235439664 has 40 divisors (see below), whose sum is σ = 42601101728. Its totient is φ = 8242145280.

The previous prime is 19235439611. The next prime is 19235439673. The reversal of 19235439664 is 46693453291.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689344 + ... + 716704.

Almost surely, 2^19235439664 is an apocalyptic number.

19235439664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19235439664 is an abundant number, since it is smaller than the sum of its proper divisors (23365662064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19235439664 is a wasteful number, since it uses less digits than its factorization.

19235439664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33653 (or 33647 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 52.

The spelling of 19235439664 in words is "nineteen billion, two hundred thirty-five million, four hundred thirty-nine thousand, six hundred sixty-four".