18954413 has 4 divisors (see below), whose sum is σ = 18968928. Its totient is φ = 18939900.

The previous prime is 18954407. The next prime is 18954421. The reversal of 18954413 is 31445981.

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.

It is a cyclic number.

It is not a de Polignac number, because 18954413 - 2⁶ = 18954349 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 (18954433) 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 3 ways as a sum of consecutive naturals, for example, 5081 + ... + 7982.

It is an arithmetic number, because the mean of its divisors is an integer number (4742232).

Almost surely, 2^18954413 is an apocalyptic number.

It is an amenable number.

18954413 is a deficient number, since it is larger than the sum of its proper divisors (14515).

18954413 is a wasteful number, since it uses less digits than its factorization.

18954413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14514.

The product of its digits is 17280, while the sum is 35.

The square root of 18954413 is about 4353.6666156241. Note that the first 4 decimals coincide. The cubic root of 18954413 is about 266.6265826904.

The spelling of 18954413 in words is "eighteen million, nine hundred fifty-four thousand, four hundred thirteen".