1820082819 has 16 divisors (see below), whose sum is σ = 2523100160. Its totient is φ = 1165790880.

The previous prime is 1820082791. The next prime is 1820082853. The reversal of 1820082819 is 9182800281.

It is a de Polignac number, because none of the positive numbers 2^k-1820082819 is a prime.

It is a super-2 number, since 2×1820082819² = 6625402936037973522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820082899) 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, 57472 + ... + 83325.

It is an arithmetic number, because the mean of its divisors is an integer number (157693760).

Almost surely, 2^1820082819 is an apocalyptic number.

1820082819 is a deficient number, since it is larger than the sum of its proper divisors (703017341).

1820082819 is a wasteful number, since it uses less digits than its factorization.

1820082819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140970.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 1820082819 is about 42662.4286580124. The cubic root of 1820082819 is about 1220.9476689039.

The spelling of 1820082819 in words is "one billion, eight hundred twenty million, eighty-two thousand, eight hundred nineteen".