19986519552 has 80 divisors (see below), whose sum is σ = 53434645440. Its totient is φ = 6638487552.

The previous prime is 19986519551. The next prime is 19986519563. The reversal of 19986519552 is 25591568991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19986519551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411699 + ... + 457677.

It is an arithmetic number, because the mean of its divisors is an integer number (667933068).

Almost surely, 2^19986519552 is an apocalyptic number.

19986519552 is a gapful number since it is divisible by the number (12) 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 19986519552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26717322720).

19986519552 is an abundant number, since it is smaller than the sum of its proper divisors (33448125888).

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

19986519552 is an equidigital number, since it uses as much as digits as its factorization.

19986519552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46283 (or 46267 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 60.

The spelling of 19986519552 in words is "nineteen billion, nine hundred eighty-six million, five hundred nineteen thousand, five hundred fifty-two".