18528000001 has 24 divisors (see below), whose sum is σ = 22840520616. Its totient is φ = 14934044160.

The previous prime is 18527999993. The next prime is 18528000059. The reversal of 18528000001 is 10000082581.

It can be written as a sum of positive squares in 4 ways, for example, as 13613288976 + 4914711025 = 116676^2 + 70105^2 .

It is not a de Polignac number, because 18528000001 - 2³ = 18527999993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18528000001.

It is not an unprimeable number, because it can be changed into a prime (18528000301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1021431 + ... + 1039411.

It is an arithmetic number, because the mean of its divisors is an integer number (951688359).

Almost surely, 2^18528000001 is an apocalyptic number.

It is an amenable number.

18528000001 is a deficient number, since it is larger than the sum of its proper divisors (4312520615).

18528000001 is a wasteful number, since it uses less digits than its factorization.

18528000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19249 (or 19242 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 18528000001 its reverse (10000082581), we get a palindrome (28528082582).

The spelling of 18528000001 in words is "eighteen billion, five hundred twenty-eight million, one", and thus it is an aban number.