18934413 has 12 divisors (see below), whose sum is σ = 26819520. Its totient is φ = 11879872.

The previous prime is 18934381. The next prime is 18934423. The reversal of 18934413 is 31443981.

It is not a de Polignac number, because 18934413 - 2⁵ = 18934381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934423) 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 11 ways as a sum of consecutive naturals, for example, 10053 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (2234960).

Almost surely, 2^18934413 is an apocalyptic number.

It is an amenable number.

18934413 is a deficient number, since it is larger than the sum of its proper divisors (7885107).

18934413 is a wasteful number, since it uses less digits than its factorization.

18934413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21876 (or 21859 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 18934413 is about 4351.3690948942. The cubic root of 18934413 is about 266.5327714968.

The spelling of 18934413 in words is "eighteen million, nine hundred thirty-four thousand, four hundred thirteen".