18041437 has 4 divisors (see below), whose sum is σ = 19102716. Its totient is φ = 16980160.

The previous prime is 18041383. The next prime is 18041449. The reversal of 18041437 is 73414081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16818201 + 1223236 = 4101^2 + 1106^2 .

It is a cyclic number.

It is not a de Polignac number, because 18041437 - 2¹¹ = 18039389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18041497) 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, 530614 + ... + 530647.

It is an arithmetic number, because the mean of its divisors is an integer number (4775679).

Almost surely, 2^18041437 is an apocalyptic number.

18041437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18041437 is a deficient number, since it is larger than the sum of its proper divisors (1061279).

18041437 is a wasteful number, since it uses less digits than its factorization.

18041437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061278.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18041437 is about 4247.5212771686. The cubic root of 18041437 is about 262.2750883773.

The spelling of 18041437 in words is "eighteen million, forty-one thousand, four hundred thirty-seven".