19399432512 has 56 divisors (see below), whose sum is σ = 51402296992. Its totient is φ = 6457075200.

The previous prime is 19399432471. The next prime is 19399432517. The reversal of 19399432512 is 21523499391.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19399432517) by changing a digit.

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, 59562 + ... + 205782.

Almost surely, 2^19399432512 is an apocalyptic number.

19399432512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19399432512 is an abundant number, since it is smaller than the sum of its proper divisors (32002864480).

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

19399432512 is a wasteful number, since it uses less digits than its factorization.

19399432512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146927 (or 146917 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The spelling of 19399432512 in words is "nineteen billion, three hundred ninety-nine million, four hundred thirty-two thousand, five hundred twelve".