82018320 has 40 divisors (see below), whose sum is σ = 254257536. Its totient is φ = 21871488.

The previous prime is 82018303. The next prime is 82018331. The reversal of 82018320 is 2381028.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170632 + ... + 171111.

Almost surely, 2^82018320 is an apocalyptic number.

82018320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82018320 is an abundant number, since it is smaller than the sum of its proper divisors (172239216).

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

82018320 is a wasteful number, since it uses less digits than its factorization.

82018320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341759 (or 341753 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 82018320 is about 9056.3966344236. The cubic root of 82018320 is about 434.4805001924.

Adding to 82018320 its reverse (2381028), we get a palindrome (84399348).

The spelling of 82018320 in words is "eighty-two million, eighteen thousand, three hundred twenty".