19820219240 has 16 divisors (see below), whose sum is σ = 44595493380. Its totient is φ = 7928087680.

The previous prime is 19820219201. The next prime is 19820219257. The reversal of 19820219240 is 4291202891.

It can be written as a sum of positive squares in 2 ways, for example, as 16000732036 + 3819487204 = 126494^2 + 61802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19820219194 and 19820219203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247752701 + ... + 247752780.

Almost surely, 2^19820219240 is an apocalyptic number.

19820219240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19820219240 is an abundant number, since it is smaller than the sum of its proper divisors (24775274140).

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

19820219240 is a wasteful number, since it uses less digits than its factorization.

19820219240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495505492 (or 495505488 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 19820219240 in words is "nineteen billion, eight hundred twenty million, two hundred nineteen thousand, two hundred forty".