18246540 has 96 divisors (see below), whose sum is σ = 55742400. Its totient is φ = 4432896.

The previous prime is 18246533. The next prime is 18246563. The reversal of 18246540 is 4564281.

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 = 18246498 and 18246507.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116142 + ... + 116298.

It is an arithmetic number, because the mean of its divisors is an integer number (580650).

Almost surely, 2^18246540 is an apocalyptic number.

18246540 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 18246540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27871200).

18246540 is an abundant number, since it is smaller than the sum of its proper divisors (37495860).

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

18246540 is a wasteful number, since it uses less digits than its factorization.

18246540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 18246540 is about 4271.5968910935. The cubic root of 18246540 is about 263.2652319045.

The spelling of 18246540 in words is "eighteen million, two hundred forty-six thousand, five hundred forty".