18441810 has 64 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 4876416.

The previous prime is 18441793. The next prime is 18441811. The reversal of 18441810 is 1814481.

It is a super-2 number, since 2×18441810² = 680200712152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18441811) 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 31 ways as a sum of consecutive naturals, for example, 44886 + ... + 45294.

It is an arithmetic number, because the mean of its divisors is an integer number (774900).

Almost surely, 2^18441810 is an apocalyptic number.

18441810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18441810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24796800).

18441810 is an abundant number, since it is smaller than the sum of its proper divisors (31151790).

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

18441810 is a wasteful number, since it uses less digits than its factorization.

18441810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18441810 is about 4294.3928558063. The cubic root of 18441810 is about 264.2010348904.

The spelling of 18441810 in words is "eighteen million, four hundred forty-one thousand, eight hundred ten".