19788675840 has 288 divisors, whose sum is σ = 71099313600. Its totient is φ = 5276233728.

The previous prime is 19788675821. The next prime is 19788675847. The reversal of 19788675840 is 4857688791.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788675847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2795826 + ... + 2802894.

Almost surely, 2^19788675840 is an apocalyptic number.

19788675840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19788675840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35549656800).

19788675840 is an abundant number, since it is smaller than the sum of its proper divisors (51310637760).

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

19788675840 is an frugal number, since it uses more digits than its factorization.

19788675840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111 (or 7079 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 19788675840 in words is "nineteen billion, seven hundred eighty-eight million, six hundred seventy-five thousand, eight hundred forty".