82020019 has 8 divisors (see below), whose sum is σ = 87892560. Its totient is φ = 76263936.

The previous prime is 82020007. The next prime is 82020031. The reversal of 82020019 is 91002028.

It is an interprime number because it is at equal distance from previous prime (82020007) and next prime (82020031).

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 82020019 - 2⁷ = 82019891 is a prime.

It is a super-2 number, since 2×82020019² = 13454567033520722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82020319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27654 + ... + 30475.

It is an arithmetic number, because the mean of its divisors is an integer number (10986570).

Almost surely, 2^82020019 is an apocalyptic number.

82020019 is a deficient number, since it is larger than the sum of its proper divisors (5872541).

82020019 is a wasteful number, since it uses less digits than its factorization.

82020019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58229.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 82020019 is about 9056.4904350416. The cubic root of 82020019 is about 434.4835002428.

Subtracting 82020019 from its reverse (91002028), we obtain a square (8982009 = 2997²).

The spelling of 82020019 in words is "eighty-two million, twenty thousand, nineteen".