18983081 has 16 divisors (see below), whose sum is σ = 21658560. Its totient is φ = 16511040.

The previous prime is 18983059. The next prime is 18983093. The reversal of 18983081 is 18038981.

It is not a de Polignac number, because 18983081 - 2²² = 14788777 is a prime.

It is a super-2 number, since 2×18983081² = 720714728505122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18983011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15626 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (1353660).

Almost surely, 2^18983081 is an apocalyptic number.

It is an amenable number.

18983081 is a deficient number, since it is larger than the sum of its proper divisors (2675479).

18983081 is a wasteful number, since it uses less digits than its factorization.

18983081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 18983081 is about 4356.9577689025. The cubic root of 18983081 is about 266.7609366357.

The spelling of 18983081 in words is "eighteen million, nine hundred eighty-three thousand, eighty-one".