18743040 has 108 divisors (see below), whose sum is σ = 64888824. Its totient is φ = 4995072.

The previous prime is 18743033. The next prime is 18743047. The reversal of 18743040 is 4034781.

It is an interprime number because it is at equal distance from previous prime (18743033) and next prime (18743047).

It is a junction number, because it is equal to n+sod(n) for n = 18742995 and 18743013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18743047) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10707 + ... + 12333.

Almost surely, 2^18743040 is an apocalyptic number.

18743040 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 18743040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32444412).

18743040 is an abundant number, since it is smaller than the sum of its proper divisors (46145784).

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

18743040 is a wasteful number, since it uses less digits than its factorization.

18743040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18743040 is about 4329.3232727529. The cubic root of 18743040 is about 265.6317666558.

The spelling of 18743040 in words is "eighteen million, seven hundred forty-three thousand, forty".