19181820011000 has 64 divisors (see below), whose sum is σ = 44886132776160. Its totient is φ = 7672612800000.

The previous prime is 19181820010973. The next prime is 19181820011041. The reversal of 19181820011000 is 11002818191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104469275 + ... + 104652725.

Almost surely, 2^{19181820011000} is an apocalyptic number.

19181820011000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19181820011000 is an abundant number, since it is smaller than the sum of its proper divisors (25704312765160).

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

19181820011000 is a wasteful number, since it uses less digits than its factorization.

19181820011000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288033 (or 288019 counting only the distinct ones).

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

Adding to 19181820011000 its reverse (11002818191), we get a palindrome (19192822829191).

The spelling of 19181820011000 in words is "nineteen trillion, one hundred eighty-one billion, eight hundred twenty million, eleven thousand".