19808302340 has 12 divisors (see below), whose sum is σ = 41597434956. Its totient is φ = 7923320928.

The previous prime is 19808302333. The next prime is 19808302387. The reversal of 19808302340 is 4320380891.

It can be written as a sum of positive squares in 2 ways, for example, as 3681334276 + 16126968064 = 60674^2 + 126992^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19808302294 and 19808302303.

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, 495207539 + ... + 495207578.

It is an arithmetic number, because the mean of its divisors is an integer number (3466452913).

Almost surely, 2^19808302340 is an apocalyptic number.

19808302340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19808302340 is an abundant number, since it is smaller than the sum of its proper divisors (21789132616).

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

19808302340 is a wasteful number, since it uses less digits than its factorization.

19808302340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990415126 (or 990415124 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 19808302340 in words is "nineteen billion, eight hundred eight million, three hundred two thousand, three hundred forty".