18752740 has 12 divisors (see below), whose sum is σ = 39380796. Its totient is φ = 7501088.

The previous prime is 18752731. The next prime is 18752743. The reversal of 18752740 is 4725781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 6022116 = 3568^2 + 2454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18752696 and 18752705.

It is not an unprimeable number, because it can be changed into a prime (18752743) 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 3 ways as a sum of consecutive naturals, for example, 468799 + ... + 468838.

It is an arithmetic number, because the mean of its divisors is an integer number (3281733).

Almost surely, 2^18752740 is an apocalyptic number.

18752740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18752740 is an abundant number, since it is smaller than the sum of its proper divisors (20628056).

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

18752740 is a wasteful number, since it uses less digits than its factorization.

18752740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937646 (or 937644 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 18752740 is about 4330.4433953118. The cubic root of 18752740 is about 265.6775824853.

The spelling of 18752740 in words is "eighteen million, seven hundred fifty-two thousand, seven hundred forty".