19309245818 has 16 divisors (see below), whose sum is σ = 29252461056. Its totient is φ = 9558473040.

The previous prime is 19309245817. The next prime is 19309245871. The reversal of 19309245818 is 81854290391.

It is not an unprimeable number, because it can be changed into a prime (19309245817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025408 + ... + 1044068.

It is an arithmetic number, because the mean of its divisors is an integer number (1828278816).

Almost surely, 2^19309245818 is an apocalyptic number.

19309245818 is a deficient number, since it is larger than the sum of its proper divisors (9943215238).

19309245818 is a wasteful number, since it uses less digits than its factorization.

19309245818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23789.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 19309245818 in words is "nineteen billion, three hundred nine million, two hundred forty-five thousand, eight hundred eighteen".