18913485305 has 32 divisors (see below), whose sum is σ = 28067437440. Its totient is φ = 12028884480.

The previous prime is 18913485293. The next prime is 18913485317. The reversal of 18913485305 is 50358431981.

It is an interprime number because it is at equal distance from previous prime (18913485293) and next prime (18913485317).

It is not a de Polignac number, because 18913485305 - 2¹⁰ = 18913484281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18913485305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 682532 + ... + 709701.

It is an arithmetic number, because the mean of its divisors is an integer number (877107420).

Almost surely, 2^18913485305 is an apocalyptic number.

It is an amenable number.

18913485305 is a deficient number, since it is larger than the sum of its proper divisors (9153952135).

18913485305 is a wasteful number, since it uses less digits than its factorization.

18913485305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392281.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 18913485305 in words is "eighteen billion, nine hundred thirteen million, four hundred eighty-five thousand, three hundred five".