81096018 has 32 divisors (see below), whose sum is σ = 172497600. Its totient is φ = 25328640.

The previous prime is 81095981. The next prime is 81096019. The reversal of 81096018 is 81069018.

81096018 is a strobogrammatic number because it is the same when read upside-down.

It is a self number, because there is not a number n which added to its sum of digits gives 81096018.

It is not an unprimeable number, because it can be changed into a prime (81096019) 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, 22933 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (5390550).

Almost surely, 2^81096018 is an apocalyptic number.

81096018 is an abundant number, since it is smaller than the sum of its proper divisors (91401582).

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

81096018 is a wasteful number, since it uses less digits than its factorization.

81096018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 81096018 is about 9005.3327534300. The cubic root of 81096018 is about 432.8457689145.

Subtracting from 81096018 its reverse (81069018), we obtain a cube (27000 = 30³).

The spelling of 81096018 in words is "eighty-one million, ninety-six thousand, eighteen".