18814812 has 12 divisors (see below), whose sum is σ = 43901256. Its totient is φ = 6271600.

The previous prime is 18814811. The next prime is 18814813. The reversal of 18814812 is 21841881.

It is an interprime number because it is at equal distance from previous prime (18814811) and next prime (18814813).

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 783939 + ... + 783962.

It is an arithmetic number, because the mean of its divisors is an integer number (3658438).

Almost surely, 2^18814812 is an apocalyptic number.

18814812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18814812 is an abundant number, since it is smaller than the sum of its proper divisors (25086444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18814812 is a wasteful number, since it uses less digits than its factorization.

18814812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567908 (or 1567906 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 18814812 is about 4337.6044079653. The cubic root of 18814812 is about 265.9703926192.

The spelling of 18814812 in words is "eighteen million, eight hundred fourteen thousand, eight hundred twelve".