19428923232 has 72 divisors (see below), whose sum is σ = 56535943464. Its totient is φ = 6325691904.

The previous prime is 19428923203. The next prime is 19428923249. The reversal of 19428923232 is 23232982491.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772053 + ... + 796820.

It is an arithmetic number, because the mean of its divisors is an integer number (785221437).

Almost surely, 2^19428923232 is an apocalyptic number.

19428923232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19428923232 is an abundant number, since it is smaller than the sum of its proper divisors (37107020232).

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

19428923232 is a wasteful number, since it uses less digits than its factorization.

19428923232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568932 (or 1568921 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 19428923232 in words is "nineteen billion, four hundred twenty-eight million, nine hundred twenty-three thousand, two hundred thirty-two".