18427812 has 24 divisors (see below), whose sum is σ = 46306176. Its totient is φ = 5670048.

The previous prime is 18427811. The next prime is 18427823. The reversal of 18427812 is 21872481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18427811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58908 + ... + 59219.

It is an arithmetic number, because the mean of its divisors is an integer number (1929424).

Almost surely, 2^18427812 is an apocalyptic number.

18427812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18427812 is an abundant number, since it is smaller than the sum of its proper divisors (27878364).

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

18427812 is a wasteful number, since it uses less digits than its factorization.

18427812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118147 (or 118145 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 18427812 is about 4292.7627467634. The cubic root of 18427812 is about 264.1341719272.

The spelling of 18427812 in words is "eighteen million, four hundred twenty-seven thousand, eight hundred twelve".