18466140 has 144 divisors (see below), whose sum is σ = 65729664. Its totient is φ = 3830400.

The previous prime is 18466139. The next prime is 18466141. The reversal of 18466140 is 4166481.

It is an interprime number because it is at equal distance from previous prime (18466139) and next prime (18466141).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18466098 and 18466107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32055 + ... + 32625.

It is an arithmetic number, because the mean of its divisors is an integer number (456456).

Almost surely, 2^18466140 is an apocalyptic number.

18466140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18466140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32864832).

18466140 is an abundant number, since it is smaller than the sum of its proper divisors (47263524).

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

18466140 is a wasteful number, since it uses less digits than its factorization.

18466140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18466140 is about 4297.2246857710. The cubic root of 18466140 is about 264.3171693056.

The spelling of 18466140 in words is "eighteen million, four hundred sixty-six thousand, one hundred forty".