18983140 has 24 divisors (see below), whose sum is σ = 43489152. Its totient is φ = 6902880.

The previous prime is 18983093. The next prime is 18983161. The reversal of 18983140 is 4138981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18983096 and 18983105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42924 + ... + 43363.

It is an arithmetic number, because the mean of its divisors is an integer number (1812048).

Almost surely, 2^18983140 is an apocalyptic number.

18983140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18983140 is an abundant number, since it is smaller than the sum of its proper divisors (24506012).

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

18983140 is a wasteful number, since it uses less digits than its factorization.

18983140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86307 (or 86305 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18983140 is about 4356.9645396767. The cubic root of 18983140 is about 266.7612130025.

The spelling of 18983140 in words is "eighteen million, nine hundred eighty-three thousand, one hundred forty".