18275540 has 24 divisors (see below), whose sum is σ = 38466792. Its totient is φ = 7293440.

The previous prime is 18275531. The next prime is 18275573. The reversal of 18275540 is 4557281.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 18267076 = 92^2 + 4274^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18275497 and 18275506.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11600 + ... + 13080.

It is an arithmetic number, because the mean of its divisors is an integer number (1602783).

Almost surely, 2^18275540 is an apocalyptic number.

18275540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18275540 is an abundant number, since it is smaller than the sum of its proper divisors (20191252).

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

18275540 is a wasteful number, since it uses less digits than its factorization.

18275540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2105 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 18275540 is about 4274.9900584680. The cubic root of 18275540 is about 263.4046309463.

The spelling of 18275540 in words is "eighteen million, two hundred seventy-five thousand, five hundred forty".