19403224440 has 32 divisors (see below), whose sum is σ = 58209673680. Its totient is φ = 5174193152.

The previous prime is 19403224439. The next prime is 19403224447. The reversal of 19403224440 is 4442230491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19403224447) 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, 80846649 + ... + 80846888.

Almost surely, 2^19403224440 is an apocalyptic number.

19403224440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19403224440 is an abundant number, since it is smaller than the sum of its proper divisors (38806449240).

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

19403224440 is a wasteful number, since it uses less digits than its factorization.

19403224440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161693551 (or 161693547 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 19403224440 in words is "nineteen billion, four hundred three million, two hundred twenty-four thousand, four hundred forty".