18037389 has 8 divisors (see below), whose sum is σ = 24700000. Its totient is φ = 11699856.

The previous prime is 18037387. The next prime is 18037423. The reversal of 18037389 is 98373081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18037389 - 2¹ = 18037387 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 (18037387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81139 + ... + 81360.

It is an arithmetic number, because the mean of its divisors is an integer number (3087500).

Almost surely, 2^18037389 is an apocalyptic number.

It is an amenable number.

18037389 is a deficient number, since it is larger than the sum of its proper divisors (6662611).

18037389 is a wasteful number, since it uses less digits than its factorization.

18037389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162539.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18037389 is about 4247.0447372261. The cubic root of 18037389 is about 262.2554711489.

The spelling of 18037389 in words is "eighteen million, thirty-seven thousand, three hundred eighty-nine".