18530785455 has 48 divisors (see below), whose sum is σ = 37143044064. Its totient is φ = 7819580160.

The previous prime is 18530785421. The next prime is 18530785459. The reversal of 18530785455 is 55458703581.

It is not a de Polignac number, because 18530785455 - 2¹⁴ = 18530769071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18530785398 and 18530785407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530785459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960136 + ... + 979245.

It is an arithmetic number, because the mean of its divisors is an integer number (773813418).

Almost surely, 2^18530785455 is an apocalyptic number.

18530785455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18530785455 is an abundant number, since it is smaller than the sum of its proper divisors (18612258609).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18530785455 is a wasteful number, since it uses less digits than its factorization.

18530785455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939416 (or 1939409 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 51.

The spelling of 18530785455 in words is "eighteen billion, five hundred thirty million, seven hundred eighty-five thousand, four hundred fifty-five".