1819082420 has 96 divisors (see below), whose sum is σ = 4341254400. Its totient is φ = 636539904.

The previous prime is 1819082413. The next prime is 1819082431. The reversal of 1819082420 is 242809181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249872 + ... + 257048.

It is an arithmetic number, because the mean of its divisors is an integer number (45221400).

Almost surely, 2^1819082420 is an apocalyptic number.

1819082420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819082420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170627200).

1819082420 is an abundant number, since it is smaller than the sum of its proper divisors (2522171980).

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

1819082420 is a wasteful number, since it uses less digits than its factorization.

1819082420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257 (or 7255 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1819082420 is about 42650.7024561144. The cubic root of 1819082420 is about 1220.7239320739.

The spelling of 1819082420 in words is "one billion, eight hundred nineteen million, eighty-two thousand, four hundred twenty".