19900000618 has 16 divisors (see below), whose sum is σ = 30271138560. Its totient is φ = 9809982000.

The previous prime is 19900000553. The next prime is 19900000619. The reversal of 19900000618 is 81600000991.

It is not an unprimeable number, because it can be changed into a prime (19900000619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20923 + ... + 200593.

It is an arithmetic number, because the mean of its divisors is an integer number (1891946160).

Almost surely, 2^19900000618 is an apocalyptic number.

19900000618 is a deficient number, since it is larger than the sum of its proper divisors (10371137942).

19900000618 is a wasteful number, since it uses less digits than its factorization.

19900000618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180453.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 19900000618 in words is "nineteen billion, nine hundred million, six hundred eighteen", and thus it is an aban number.