18934811 has 24 divisors (see below), whose sum is σ = 23408640. Its totient is φ = 14996016.

The previous prime is 18934807. The next prime is 18934829. The reversal of 18934811 is 11843981.

It is not a de Polignac number, because 18934811 - 2² = 18934807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18934801) 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 23 ways as a sum of consecutive naturals, for example, 149030 + ... + 149156.

It is an arithmetic number, because the mean of its divisors is an integer number (975360).

Almost surely, 2^18934811 is an apocalyptic number.

18934811 is a deficient number, since it is larger than the sum of its proper divisors (4473829).

18934811 is a wasteful number, since it uses less digits than its factorization.

18934811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 212 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 18934811 is about 4351.4148273866. The cubic root of 18934811 is about 266.5346389837.

The spelling of 18934811 in words is "eighteen million, nine hundred thirty-four thousand, eight hundred eleven".