19814824618 has 16 divisors (see below), whose sum is σ = 29928140064. Its totient is φ = 9838848240.

The previous prime is 19814824613. The next prime is 19814824661. The reversal of 19814824618 is 81642841891.

It is a super-3 number, since 3×19814824618³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19814824613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 582253 + ... + 615343.

It is an arithmetic number, because the mean of its divisors is an integer number (1870508754).

Almost surely, 2^19814824618 is an apocalyptic number.

19814824618 is a deficient number, since it is larger than the sum of its proper divisors (10113315446).

19814824618 is a wasteful number, since it uses less digits than its factorization.

19814824618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35157.

The product of its digits is 884736, while the sum is 52.

The spelling of 19814824618 in words is "nineteen billion, eight hundred fourteen million, eight hundred twenty-four thousand, six hundred eighteen".