19789877652 has 48 divisors (see below), whose sum is σ = 48685842240. Its totient is φ = 6239261952.

The previous prime is 19789877647. The next prime is 19789877687. The reversal of 19789877652 is 25677898791.

It is a super-2 number, since 2×19789877652² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70338 + ... + 211014.

It is an arithmetic number, because the mean of its divisors is an integer number (1014288380).

Almost surely, 2^19789877652 is an apocalyptic number.

19789877652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is a pronic number, being equal to 140676×140677.

It is an amenable number.

19789877652 is an abundant number, since it is smaller than the sum of its proper divisors (28895964588).

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

19789877652 is a wasteful number, since it uses less digits than its factorization.

19789877652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141320 (or 141318 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 69.

The spelling of 19789877652 in words is "nineteen billion, seven hundred eighty-nine million, eight hundred seventy-seven thousand, six hundred fifty-two".