18528650550 has 72 divisors (see below), whose sum is σ = 50938042584. Its totient is φ = 4826062080.

The previous prime is 18528650521. The next prime is 18528650573. The reversal of 18528650550 is 5505682581.

18528650550 is a `hidden beast` number, since 18 + 5 + 2 + 86 + 5 + 0 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18528650496 and 18528650505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 459427 + ... + 498126.

Almost surely, 2^18528650550 is an apocalyptic number.

18528650550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18528650550 is an abundant number, since it is smaller than the sum of its proper divisors (32409392034).

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

18528650550 is a wasteful number, since it uses less digits than its factorization.

18528650550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957614 (or 957606 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 45.

The spelling of 18528650550 in words is "eighteen billion, five hundred twenty-eight million, six hundred fifty thousand, five hundred fifty".