18841812 has 48 divisors (see below), whose sum is σ = 48216000. Its totient is φ = 5679360.

The previous prime is 18841789. The next prime is 18841819. The reversal of 18841812 is 21814881.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18841819) 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 15 ways as a sum of consecutive naturals, for example, 45864 + ... + 46272.

It is an arithmetic number, because the mean of its divisors is an integer number (1004500).

Almost surely, 2^18841812 is an apocalyptic number.

18841812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18841812 is an abundant number, since it is smaller than the sum of its proper divisors (29374188).

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

18841812 is a wasteful number, since it uses less digits than its factorization.

18841812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 774 counting only the distinct ones).

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

The square root of 18841812 is about 4340.7156092055. The cubic root of 18841812 is about 266.0975578235.

The spelling of 18841812 in words is "eighteen million, eight hundred forty-one thousand, eight hundred twelve".