19019920000 has 80 divisors (see below), whose sum is σ = 47349101250. Its totient is φ = 7607936000.

The previous prime is 19019919937. The next prime is 19019920009. The reversal of 19019920000 is 2991091.

It can be written as a sum of positive squares in 5 ways, for example, as 399680064 + 18620239936 = 19992^2 + 136456^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (19019920009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38875 + ... + 198874.

Almost surely, 2^19019920000 is an apocalyptic number.

19019920000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19019920000 is an abundant number, since it is smaller than the sum of its proper divisors (28329181250).

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

19019920000 is an frugal number, since it uses more digits than its factorization.

19019920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237783 (or 237756 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 19019920000 in words is "nineteen billion, nineteen million, nine hundred twenty thousand".