18494949 has 16 divisors (see below), whose sum is σ = 27016704. Its totient is φ = 11161200.

The previous prime is 18494909. The next prime is 18494981. The reversal of 18494949 is 94949481.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18494949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18494898 and 18494907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18494909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7614 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (1688544).

Almost surely, 2^18494949 is an apocalyptic number.

It is an amenable number.

18494949 is a deficient number, since it is larger than the sum of its proper divisors (8521755).

18494949 is a wasteful number, since it uses less digits than its factorization.

18494949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 373248, while the sum is 48.

The square root of 18494949 is about 4300.5754266144. The cubic root of 18494949 is about 264.4545515064.

The spelling of 18494949 in words is "eighteen million, four hundred ninety-four thousand, nine hundred forty-nine".