19218068900 has 36 divisors (see below), whose sum is σ = 41822778900. Its totient is φ = 7665187200.

The previous prime is 19218068893. The next prime is 19218068921. The reversal of 19218068900 is 986081291.

It can be written as a sum of positive squares in 6 ways, for example, as 98922916 + 19119145984 = 9946^2 + 138272^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240431 + ... + 310230.

Almost surely, 2^19218068900 is an apocalyptic number.

19218068900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19218068900 is an abundant number, since it is smaller than the sum of its proper divisors (22604710000).

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

19218068900 is a wasteful number, since it uses less digits than its factorization.

19218068900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551024 (or 551017 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 19218068900 in words is "nineteen billion, two hundred eighteen million, sixty-eight thousand, nine hundred".