18546149 has 4 divisors (see below), whose sum is σ = 18555264. Its totient is φ = 18537036.

The previous prime is 18546107. The next prime is 18546163. The reversal of 18546149 is 94164581.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18546149 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 (18543149) 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, 44 + ... + 6090.

It is an arithmetic number, because the mean of its divisors is an integer number (4638816).

Almost surely, 2^18546149 is an apocalyptic number.

It is an amenable number.

18546149 is a deficient number, since it is larger than the sum of its proper divisors (9115).

18546149 is an equidigital number, since it uses as much as digits as its factorization.

18546149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114.

The product of its digits is 34560, while the sum is 38.

The square root of 18546149 is about 4306.5240043450. The cubic root of 18546149 is about 264.6983585729.

The spelling of 18546149 in words is "eighteen million, five hundred forty-six thousand, one hundred forty-nine".