18486340 has 24 divisors (see below), whose sum is σ = 40161240. Its totient is φ = 7139328.

The previous prime is 18486331. The next prime is 18486353. The reversal of 18486340 is 4368481.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 17859076 = 792^2 + 4226^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18486296 and 18486305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15357 + ... + 16516.

It is an arithmetic number, because the mean of its divisors is an integer number (1673385).

Almost surely, 2^18486340 is an apocalyptic number.

18486340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18486340 is an abundant number, since it is smaller than the sum of its proper divisors (21674900).

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

18486340 is a wasteful number, since it uses less digits than its factorization.

18486340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31911 (or 31909 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18486340 is about 4299.5743975422. The cubic root of 18486340 is about 264.4135125075.

The spelling of 18486340 in words is "eighteen million, four hundred eighty-six thousand, three hundred forty".