18884740 has 48 divisors (see below), whose sum is σ = 46392192. Its totient is φ = 6322176.

The previous prime is 18884737. The next prime is 18884753. The reversal of 18884740 is 4748881.

It is a junction number, because it is equal to n+sod(n) for n = 18884693 and 18884702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4452 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (966504).

Almost surely, 2^18884740 is an apocalyptic number.

18884740 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 18884740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23196096).

18884740 is an abundant number, since it is smaller than the sum of its proper divisors (27507452).

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

18884740 is a wasteful number, since it uses less digits than its factorization.

18884740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3194 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 18884740 is about 4345.6576027110. The cubic root of 18884740 is about 266.2994911930.

The spelling of 18884740 in words is "eighteen million, eight hundred eighty-four thousand, seven hundred forty".