18149709 has 8 divisors (see below), whose sum is σ = 24220512. Its totient is φ = 12089360.

The previous prime is 18149707. The next prime is 18149711. The reversal of 18149709 is 90794181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18149707) and next prime (18149711).

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

It is a cyclic number.

It is not a de Polignac number, because 18149709 - 2¹ = 18149707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18149701) 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, 3454 + ... + 6944.

It is an arithmetic number, because the mean of its divisors is an integer number (3027564).

Almost surely, 2^18149709 is an apocalyptic number.

It is an amenable number.

18149709 is a deficient number, since it is larger than the sum of its proper divisors (6070803).

18149709 is a wasteful number, since it uses less digits than its factorization.

18149709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 18149709 is about 4260.2475280199. The cubic root of 18149709 is about 262.7987057708.

The spelling of 18149709 in words is "eighteen million, one hundred forty-nine thousand, seven hundred nine".