18653812 has 12 divisors (see below), whose sum is σ = 32689440. Its totient is φ = 9313976.

The previous prime is 18653797. The next prime is 18653819. The reversal of 18653812 is 21835681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18653819) 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, 489 + ... + 6127.

It is an arithmetic number, because the mean of its divisors is an integer number (2724120).

Almost surely, 2^18653812 is an apocalyptic number.

It is an amenable number.

18653812 is a deficient number, since it is larger than the sum of its proper divisors (14035628).

18653812 is a wasteful number, since it uses less digits than its factorization.

18653812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470 (or 6468 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 18653812 is about 4319.0059041404. The cubic root of 18653812 is about 265.2095743362.

The spelling of 18653812 in words is "eighteen million, six hundred fifty-three thousand, eight hundred twelve".