18785740 has 12 divisors (see below), whose sum is σ = 39450096. Its totient is φ = 7514288.

The previous prime is 18785729. The next prime is 18785791. The reversal of 18785740 is 4758781.

It is a junction number, because it is equal to n+sod(n) for n = 18785693 and 18785702.

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 3 ways as a sum of consecutive naturals, for example, 469624 + ... + 469663.

It is an arithmetic number, because the mean of its divisors is an integer number (3287508).

Almost surely, 2^18785740 is an apocalyptic number.

18785740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18785740 is an abundant number, since it is smaller than the sum of its proper divisors (20664356).

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

18785740 is a wasteful number, since it uses less digits than its factorization.

18785740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939296 (or 939294 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 18785740 is about 4334.2519539132. The cubic root of 18785740 is about 265.8333325690.

The spelling of 18785740 in words is "eighteen million, seven hundred eighty-five thousand, seven hundred forty".