18071740 has 24 divisors (see below), whose sum is σ = 38035872. Its totient is φ = 7212480.

The previous prime is 18071699. The next prime is 18071741. The reversal of 18071740 is 4717081.

It is a junction number, because it is equal to n+sod(n) for n = 18071699 and 18071708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18071741) 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 7 ways as a sum of consecutive naturals, for example, 12537 + ... + 13903.

It is an arithmetic number, because the mean of its divisors is an integer number (1584828).

Almost surely, 2^18071740 is an apocalyptic number.

18071740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18071740 is an abundant number, since it is smaller than the sum of its proper divisors (19964132).

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

18071740 is a wasteful number, since it uses less digits than its factorization.

18071740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 18071740 is about 4251.0869198359. The cubic root of 18071740 is about 262.4218482390.

The spelling of 18071740 in words is "eighteen million, seventy-one thousand, seven hundred forty".