18899490605 has 8 divisors (see below), whose sum is σ = 22716031200. Its totient is φ = 15095164176.

The previous prime is 18899490593. The next prime is 18899490607. The reversal of 18899490605 is 50609499881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18899490605 - 2⁶ = 18899490541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18899490607) 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, 3050135 + ... + 3056324.

It is an arithmetic number, because the mean of its divisors is an integer number (2839503900).

Almost surely, 2^18899490605 is an apocalyptic number.

It is an amenable number.

18899490605 is a deficient number, since it is larger than the sum of its proper divisors (3816540595).

18899490605 is an equidigital number, since it uses as much as digits as its factorization.

18899490605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6107083.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 18899490605 in words is "eighteen billion, eight hundred ninety-nine million, four hundred ninety thousand, six hundred five".