19730989984 has 24 divisors (see below), whose sum is σ = 38855319300. Its totient is φ = 9862972416.

The previous prime is 19730989931. The next prime is 19730989997. The reversal of 19730989984 is 48998903791.

It can be written as a sum of positive squares in 2 ways, for example, as 18730659600 + 1000330384 = 136860^2 + 31628^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51592 + ... + 205240.

Almost surely, 2^19730989984 is an apocalyptic number.

It is an amenable number.

19730989984 is a deficient number, since it is larger than the sum of its proper divisors (19124329316).

19730989984 is a wasteful number, since it uses less digits than its factorization.

19730989984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157672 (or 157664 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 19730989984 in words is "nineteen billion, seven hundred thirty million, nine hundred eighty-nine thousand, nine hundred eighty-four".