19431981200 has 30 divisors (see below), whose sum is σ = 46685335794. Its totient is φ = 7772792320.

The previous prime is 19431981187. The next prime is 19431981211. The reversal of 19431981200 is 218913491.

It can be written as a sum of positive squares in 3 ways, for example, as 4289202064 + 15142779136 = 65492^2 + 123056^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24289577 + ... + 24290376.

Almost surely, 2^19431981200 is an apocalyptic number.

19431981200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19431981200 is an abundant number, since it is smaller than the sum of its proper divisors (27253354594).

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

19431981200 is a wasteful number, since it uses less digits than its factorization.

19431981200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48579971 (or 48579960 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 19431981200 in words is "nineteen billion, four hundred thirty-one million, nine hundred eighty-one thousand, two hundred".