1820091819100 has 36 divisors (see below), whose sum is σ = 3949886954944. Its totient is φ = 727983694080.

The previous prime is 1820091819083. The next prime is 1820091819107. The reversal of 1820091819100 is 19181900281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820091819107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731317 + ... + 2043283.

Almost surely, 2^{1820091819100} is an apocalyptic number.

1820091819100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820091819100 is an abundant number, since it is smaller than the sum of its proper divisors (2129795135844).

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

1820091819100 is a wasteful number, since it uses less digits than its factorization.

1820091819100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325854 (or 1325847 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 1820091819100 in words is "one trillion, eight hundred twenty billion, ninety-one million, eight hundred nineteen thousand, one hundred".