19438755792 has 40 divisors (see below), whose sum is σ = 50233272960. Its totient is φ = 6477457920.

The previous prime is 19438755773. The next prime is 19438755793. The reversal of 19438755792 is 29755783491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19438755793) 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, 84792 + ... + 214632.

It is an arithmetic number, because the mean of its divisors is an integer number (1255831824).

Almost surely, 2^19438755792 is an apocalyptic number.

19438755792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19438755792 is an abundant number, since it is smaller than the sum of its proper divisors (30794517168).

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

19438755792 is a wasteful number, since it uses less digits than its factorization.

19438755792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132971 (or 132965 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 60.

The spelling of 19438755792 in words is "nineteen billion, four hundred thirty-eight million, seven hundred fifty-five thousand, seven hundred ninety-two".