18546949 has 4 divisors (see below), whose sum is σ = 19637964. Its totient is φ = 17455936.

The previous prime is 18546937. The next prime is 18547003. The reversal of 18546949 is 94964581.

It is a happy number.

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 14010049 + 4536900 = 3743^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 18546949 - 2⁵ = 18546917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18546899 and 18546908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18546929) 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, 545482 + ... + 545515.

It is an arithmetic number, because the mean of its divisors is an integer number (4909491).

Almost surely, 2^18546949 is an apocalyptic number.

It is an amenable number.

18546949 is a deficient number, since it is larger than the sum of its proper divisors (1091015).

18546949 is a wasteful number, since it uses less digits than its factorization.

18546949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091014.

The product of its digits is 311040, while the sum is 46.

The square root of 18546949 is about 4306.6168856772. The cubic root of 18546949 is about 264.7021644958.

The spelling of 18546949 in words is "eighteen million, five hundred forty-six thousand, nine hundred forty-nine".