18814814 has 4 divisors (see below), whose sum is σ = 28222224. Its totient is φ = 9407406.

The previous prime is 18814813. The next prime is 18814819. The reversal of 18814814 is 41841881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41841881 = 43 ⋅973067.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18814811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4703702 + ... + 4703705.

It is an arithmetic number, because the mean of its divisors is an integer number (7055556).

Almost surely, 2^18814814 is an apocalyptic number.

18814814 is a deficient number, since it is larger than the sum of its proper divisors (9407410).

18814814 is an equidigital number, since it uses as much as digits as its factorization.

18814814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9407409.

The product of its digits is 8192, while the sum is 35.

The square root of 18814814 is about 4337.6046385073. The cubic root of 18814814 is about 265.9704020434.

The spelling of 18814814 in words is "eighteen million, eight hundred fourteen thousand, eight hundred fourteen".