84081018 has 32 divisors (see below), whose sum is σ = 195448320. Its totient is φ = 23615280.

The previous prime is 84081013. The next prime is 84081071. The reversal of 84081018 is 81018048.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84081013) 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, 14488 + ... + 19443.

It is an arithmetic number, because the mean of its divisors is an integer number (6107760).

Almost surely, 2^84081018 is an apocalyptic number.

84081018 is an abundant number, since it is smaller than the sum of its proper divisors (111367302).

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

84081018 is a wasteful number, since it uses less digits than its factorization.

84081018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 84081018 is about 9169.5702189361. The cubic root of 84081018 is about 438.0926702857.

The spelling of 84081018 in words is "eighty-four million, eighty-one thousand, eighteen".