19556343930 has 64 divisors (see below), whose sum is σ = 47206800000. Its totient is φ = 5184936960.

The previous prime is 19556343899. The next prime is 19556343943. The reversal of 19556343930 is 3934365591.

It is a self number, because there is not a number n which added to its sum of digits gives 19556343930.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4204246 + ... + 4208894.

It is an arithmetic number, because the mean of its divisors is an integer number (737606250).

Almost surely, 2^19556343930 is an apocalyptic number.

19556343930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19556343930 is an abundant number, since it is smaller than the sum of its proper divisors (27650456070).

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

19556343930 is a wasteful number, since it uses less digits than its factorization.

19556343930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439.

The product of its (nonzero) digits is 1312200, while the sum is 48.

The spelling of 19556343930 in words is "nineteen billion, five hundred fifty-six million, three hundred forty-three thousand, nine hundred thirty".