1819109192820 has 24 divisors (see below), whose sum is σ = 5093505740064. Its totient is φ = 485095784736.

The previous prime is 1819109192801. The next prime is 1819109192839. The reversal of 1819109192820 is 282919019181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1819109192801) and next prime (1819109192839).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15159243214 + ... + 15159243333.

It is an arithmetic number, because the mean of its divisors is an integer number (212229405836).

Almost surely, 2^{1819109192820} is an apocalyptic number.

1819109192820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1819109192820 is an abundant number, since it is smaller than the sum of its proper divisors (3274396547244).

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

1819109192820 is a wasteful number, since it uses less digits than its factorization.

1819109192820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30318486559 (or 30318486557 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 51.

The spelling of 1819109192820 in words is "one trillion, eight hundred nineteen billion, one hundred nine million, one hundred ninety-two thousand, eight hundred twenty".