18096840 has 96 divisors (see below), whose sum is σ = 62295480. Its totient is φ = 4540416.

The previous prime is 18096829. The next prime is 18096853. The reversal of 18096840 is 4869081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14152644 + 3944196 = 3762^2 + 1986^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18096795 and 18096804.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4642 + ... + 7598.

Almost surely, 2^18096840 is an apocalyptic number.

18096840 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 18096840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31147740).

18096840 is an abundant number, since it is smaller than the sum of its proper divisors (44198640).

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

18096840 is a wasteful number, since it uses less digits than its factorization.

18096840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991 (or 2984 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18096840 is about 4254.0380816349. The cubic root of 18096840 is about 262.5432853790.

It can be divided in two parts, 1809 and 6840, that added together give a square (8649 = 93²).

The spelling of 18096840 in words is "eighteen million, ninety-six thousand, eight hundred forty".