82018791 has 16 divisors (see below), whose sum is σ = 123571200. Its totient is φ = 53751384.

The previous prime is 82018789. The next prime is 82018793. The reversal of 82018791 is 19781028.

It is an interprime number because it is at equal distance from previous prime (82018789) and next prime (82018793).

It is not a de Polignac number, because 82018791 - 2¹ = 82018789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82018793) 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, 24151 + ... + 27336.

It is an arithmetic number, because the mean of its divisors is an integer number (7723200).

Almost surely, 2^82018791 is an apocalyptic number.

82018791 is a deficient number, since it is larger than the sum of its proper divisors (41552409).

82018791 is a wasteful number, since it uses less digits than its factorization.

82018791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51555 (or 51549 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 82018791 is about 9056.4226381061. The cubic root of 82018791 is about 434.4813318762.

The spelling of 82018791 in words is "eighty-two million, eighteen thousand, seven hundred ninety-one".