19785454608 has 20 divisors (see below), whose sum is σ = 51112424528. Its totient is φ = 6595151520.

The previous prime is 19785454567. The next prime is 19785454609. The reversal of 19785454608 is 80645458791.

It is a super-3 number, since 3×19785454608³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19785454609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206098438 + ... + 206098533.

Almost surely, 2^19785454608 is an apocalyptic number.

It is an amenable number.

19785454608 is an abundant number, since it is smaller than the sum of its proper divisors (31326969920).

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

19785454608 is a wasteful number, since it uses less digits than its factorization.

19785454608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412196982 (or 412196976 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 19785454608 in words is "nineteen billion, seven hundred eighty-five million, four hundred fifty-four thousand, six hundred eight".