82020881 has 8 divisors (see below), whose sum is σ = 83569920. Its totient is φ = 80484768.

The previous prime is 82020877. The next prime is 82020919. The reversal of 82020881 is 18802028.

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

It is a cyclic number.

It is not a de Polignac number, because 82020881 - 2² = 82020877 is a prime.

It is a super-2 number, since 2×82020881² = 13454849840032322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82020811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10085 + ... + 16301.

It is an arithmetic number, because the mean of its divisors is an integer number (10446240).

Almost surely, 2^82020881 is an apocalyptic number.

It is an amenable number.

82020881 is a deficient number, since it is larger than the sum of its proper divisors (1549039).

82020881 is a wasteful number, since it uses less digits than its factorization.

82020881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6463.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 82020881 is about 9056.5380250955. The cubic root of 82020881 is about 434.4850223243.

The spelling of 82020881 in words is "eighty-two million, twenty thousand, eight hundred eighty-one".