1819022500 has 45 divisors (see below), whose sum is σ = 3982507221. Its totient is φ = 726756000.

The previous prime is 1819022497. The next prime is 1819022503. The reversal of 1819022500 is 52209181.

The square root of 1819022500 is 42650.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1819022497) and next prime (1819022503).

It can be written as a sum of positive squares in 7 ways, for example, as 1815952996 + 3069504 = 42614^2 + 1752^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819022503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2132074 + ... + 2132926.

Almost surely, 2^1819022500 is an apocalyptic number.

1819022500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1819022500 is the 42650-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819022500

1819022500 is an abundant number, since it is smaller than the sum of its proper divisors (2163484721).

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

1819022500 is an frugal number, since it uses more digits than its factorization.

1819022500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The cubic root of 1819022500 is about 1220.7105285066.

The spelling of 1819022500 in words is "one billion, eight hundred nineteen million, twenty-two thousand, five hundred".