82020069 has 12 divisors (see below), whose sum is σ = 119007616. Its totient is φ = 54433512.

The previous prime is 82020061. The next prime is 82020109. The reversal of 82020069 is 96002028.

It is not a de Polignac number, because 82020069 - 2³ = 82020061 is a prime.

It is a super-2 number, since 2×82020069² = 13454583437529522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82020061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18427 + ... + 22440.

Almost surely, 2^82020069 is an apocalyptic number.

It is an amenable number.

82020069 is a deficient number, since it is larger than the sum of its proper divisors (36987547).

82020069 is a wasteful number, since it uses less digits than its factorization.

82020069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41096 (or 41093 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 82020069 is about 9056.4931954924. The cubic root of 82020069 is about 434.4835885309.

The spelling of 82020069 in words is "eighty-two million, twenty thousand, sixty-nine".