18750340 has 108 divisors (see below), whose sum is σ = 49254156. Its totient is φ = 5975424.

The previous prime is 18750317. The next prime is 18750341. The reversal of 18750340 is 4305781.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 8561476 = 3192^2 + 2926^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 18750299 and 18750308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18750341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 353754 + ... + 353806.

It is an arithmetic number, because the mean of its divisors is an integer number (456057).

Almost surely, 2^18750340 is an apocalyptic number.

18750340 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 18750340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24627078).

18750340 is an abundant number, since it is smaller than the sum of its proper divisors (30503816).

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

18750340 is a wasteful number, since it uses less digits than its factorization.

18750340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 18750340 is about 4330.1662785625. The cubic root of 18750340 is about 265.6662480811. Note that the first 3 decimals are identical.

The spelling of 18750340 in words is "eighteen million, seven hundred fifty thousand, three hundred forty".