1819110001820 has 24 divisors (see below), whose sum is σ = 3820731826128. Its totient is φ = 727529558400.

The previous prime is 1819110001811. The next prime is 1819110001829. The reversal of 1819110001820 is 281000119181.

It is an interprime number because it is at equal distance from previous prime (1819110001811) and next prime (1819110001829).

It is a super-2 number, since 2×1819110001820² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819110001829) by changing a digit.

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, 7022246 + ... + 7276685.

It is an arithmetic number, because the mean of its divisors is an integer number (159197159422).

Almost surely, 2^{1819110001820} is an apocalyptic number.

1819110001820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1819110001820 is an abundant number, since it is smaller than the sum of its proper divisors (2001621824308).

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

1819110001820 is a wasteful number, since it uses less digits than its factorization.

1819110001820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14305301 (or 14305299 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 1819110001820 in words is "one trillion, eight hundred nineteen billion, one hundred ten million, one thousand, eight hundred twenty".