18748040 has 32 divisors (see below), whose sum is σ = 42698880. Its totient is φ = 7407552.

The previous prime is 18748033. The next prime is 18748049. The reversal of 18748040 is 4084781.

It is a junction number, because it is equal to n+sod(n) for n = 18747988 and 18748006.

It is not an unprimeable number, because it can be changed into a prime (18748049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (1334340).

Almost surely, 2^18748040 is an apocalyptic number.

18748040 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 18748040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21349440).

18748040 is an abundant number, since it is smaller than the sum of its proper divisors (23950840).

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

18748040 is a wasteful number, since it uses less digits than its factorization.

18748040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741 (or 5737 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18748040 is about 4329.9006917018. The cubic root of 18748040 is about 265.6553850362.

The spelling of 18748040 in words is "eighteen million, seven hundred forty-eight thousand, forty".