19707799280 has 80 divisors (see below), whose sum is σ = 49806749664. Its totient is φ = 7208678400.

The previous prime is 19707799217. The next prime is 19707799301. The reversal of 19707799280 is 8299770791.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22730 + ... + 199830.

Almost surely, 2^19707799280 is an apocalyptic number.

19707799280 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 19707799280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24903374832).

19707799280 is an abundant number, since it is smaller than the sum of its proper divisors (30098950384).

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

19707799280 is a wasteful number, since it uses less digits than its factorization.

19707799280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177234 (or 177228 counting only the distinct ones).

The product of its (nonzero) digits is 4000752, while the sum is 59.

The spelling of 19707799280 in words is "nineteen billion, seven hundred seven million, seven hundred ninety-nine thousand, two hundred eighty".