18149937 has 8 divisors (see below), whose sum is σ = 26061504. Its totient is φ = 11169168.

The previous prime is 18149933. The next prime is 18149941. The reversal of 18149937 is 73994181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18149933) and next prime (18149941).

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

It is not a de Polignac number, because 18149937 - 2² = 18149933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18149933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232653 + ... + 232730.

It is an arithmetic number, because the mean of its divisors is an integer number (3257688).

Almost surely, 2^18149937 is an apocalyptic number.

It is an amenable number.

18149937 is a deficient number, since it is larger than the sum of its proper divisors (7911567).

18149937 is a wasteful number, since it uses less digits than its factorization.

18149937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465399.

The product of its digits is 54432, while the sum is 42.

The square root of 18149937 is about 4260.2742869444. The cubic root of 18149937 is about 262.7998062081.

The spelling of 18149937 in words is "eighteen million, one hundred forty-nine thousand, nine hundred thirty-seven".