18861360 has 160 divisors (see below), whose sum is σ = 68090880. Its totient is φ = 4230144.

The previous prime is 18861343. The next prime is 18861377. The reversal of 18861360 is 6316881.

It is an interprime number because it is at equal distance from previous prime (18861343) and next prime (18861377).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172986 + ... + 173094.

It is an arithmetic number, because the mean of its divisors is an integer number (425568).

Almost surely, 2^18861360 is an apocalyptic number.

18861360 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 18861360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34045440).

18861360 is an abundant number, since it is smaller than the sum of its proper divisors (49229520).

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

18861360 is a wasteful number, since it uses less digits than its factorization.

18861360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18861360 is about 4342.9667279407. The cubic root of 18861360 is about 266.1895496344.

The spelling of 18861360 in words is "eighteen million, eight hundred sixty-one thousand, three hundred sixty".