18000037 has 4 divisors (see below), whose sum is σ = 19636416. Its totient is φ = 16363660.

The previous prime is 17999987. The next prime is 18000041. The reversal of 18000037 is 73000081.

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.

It is a cyclic number.

It is not a de Polignac number, because 18000037 - 2⁷ = 17999909 is a prime.

It is a Duffinian number.

18000037 is a modest number, since divided by 37 gives 18 as remainder.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 17999978 and 18000023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818173 + ... + 818194.

It is an arithmetic number, because the mean of its divisors is an integer number (4909104).

Almost surely, 2^18000037 is an apocalyptic number.

It is an amenable number.

18000037 is a deficient number, since it is larger than the sum of its proper divisors (1636379).

18000037 is a wasteful number, since it uses less digits than its factorization.

18000037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636378.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 18000037 is about 4242.6450476089. The cubic root of 18000037 is about 262.0743189901.

The spelling of 18000037 in words is "eighteen million, thirty-seven", and thus it is an aban number and an uban number.