1821119382930 has 32 divisors (see below), whose sum is σ = 4370866873344. Its totient is φ = 485611796096.

The previous prime is 1821119382923. The next prime is 1821119382931. The reversal of 1821119382930 is 392839111281.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1821119382930.

It is not an unprimeable number, because it can be changed into a prime (1821119382931) 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, 506034 + ... + 1974413.

It is an arithmetic number, because the mean of its divisors is an integer number (136589589792).

Almost surely, 2^{1821119382930} is an apocalyptic number.

1821119382930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1821119382930 is an abundant number, since it is smaller than the sum of its proper divisors (2549747490414).

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

1821119382930 is a wasteful number, since it uses less digits than its factorization.

1821119382930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504930.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 1821119382930 in words is "one trillion, eight hundred twenty-one billion, one hundred nineteen million, three hundred eighty-two thousand, nine hundred thirty".