18252005137 has 16 divisors (see below), whose sum is σ = 19822093200. Its totient is φ = 16738140160.

The previous prime is 18252005087. The next prime is 18252005153. The reversal of 18252005137 is 73150025281.

It can be written as a sum of positive squares in 8 ways, for example, as 754271296 + 17497733841 = 27464^2 + 132279^2 .

It is not a de Polignac number, because 18252005137 - 2¹¹ = 18252003089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18252005197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547689 + ... + 580057.

It is an arithmetic number, because the mean of its divisors is an integer number (1238880825).

Almost surely, 2^18252005137 is an apocalyptic number.

18252005137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18252005137 is a deficient number, since it is larger than the sum of its proper divisors (1570088063).

18252005137 is a wasteful number, since it uses less digits than its factorization.

18252005137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33236.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 18252005137 in words is "eighteen billion, two hundred fifty-two million, five thousand, one hundred thirty-seven".