18500352037 has 4 divisors (see below), whose sum is σ = 18501548256. Its totient is φ = 18499155820.

The previous prime is 18500352029. The next prime is 18500352061. The reversal of 18500352037 is 73025300581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73025300581 = 59 ⋅1237716959.

It is a cyclic number.

It is not a de Polignac number, because 18500352037 - 2³ = 18500352029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18500351993 and 18500352011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500352077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574603 + ... + 605944.

It is an arithmetic number, because the mean of its divisors is an integer number (4625387064).

Almost surely, 2^18500352037 is an apocalyptic number.

It is an amenable number.

18500352037 is a deficient number, since it is larger than the sum of its proper divisors (1196219).

18500352037 is a wasteful number, since it uses less digits than its factorization.

18500352037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196218.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 18500352037 in words is "eighteen billion, five hundred million, three hundred fifty-two thousand, thirty-seven".