18401820200 has 24 divisors (see below), whose sum is σ = 42784232430. Its totient is φ = 7360728000.

The previous prime is 18401820181. The next prime is 18401820223. The reversal of 18401820200 is 202810481.

It can be written as a sum of positive squares in 3 ways, for example, as 14726793316 + 3675026884 = 121354^2 + 60622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18401820200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46004351 + ... + 46004750.

Almost surely, 2^18401820200 is an apocalyptic number.

18401820200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18401820200 is an abundant number, since it is smaller than the sum of its proper divisors (24382412230).

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

18401820200 is a wasteful number, since it uses less digits than its factorization.

18401820200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92009117 (or 92009108 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 18401820200 in words is "eighteen billion, four hundred one million, eight hundred twenty thousand, two hundred".