19163819240 has 16 divisors (see below), whose sum is σ = 43118593380. Its totient is φ = 7665527680.

The previous prime is 19163819221. The next prime is 19163819243. The reversal of 19163819240 is 4291836191.

It can be written as a sum of positive squares in 2 ways, for example, as 17446711396 + 1717107844 = 132086^2 + 41438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19163819191 and 19163819200.

It is not an unprimeable number, because it can be changed into a prime (19163819243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239547701 + ... + 239547780.

Almost surely, 2^19163819240 is an apocalyptic number.

19163819240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19163819240 is an abundant number, since it is smaller than the sum of its proper divisors (23954774140).

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

19163819240 is a wasteful number, since it uses less digits than its factorization.

19163819240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479095492 (or 479095488 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 19163819240 in words is "nineteen billion, one hundred sixty-three million, eight hundred nineteen thousand, two hundred forty".