81190014 has 8 divisors (see below), whose sum is σ = 162380040. Its totient is φ = 27063336.

The previous prime is 81190013. The next prime is 81190027. The reversal of 81190014 is 41009118.

It is a sphenic number, since it is the product of 3 distinct primes.

81190014 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81190013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6765829 + ... + 6765840.

It is an arithmetic number, because the mean of its divisors is an integer number (20297505).

Almost surely, 2^81190014 is an apocalyptic number.

81190014 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81190014 is a wasteful number, since it uses less digits than its factorization.

81190014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531674.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 81190014 is about 9010.5501496856. The cubic root of 81190014 is about 433.0129372614.

The spelling of 81190014 in words is "eighty-one million, one hundred ninety thousand, fourteen".