18206104900 has 81 divisors (see below), whose sum is σ = 40201400253. Its totient is φ = 7156687200.

The previous prime is 18206104897. The next prime is 18206104901. The reversal of 18206104900 is 940160281.

It is a happy number.

The square root of 18206104900 is 134930.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6554197764 + 11651907136 = 80958^2 + 107944^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18206104901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 138977835 + ... + 138977965.

Almost surely, 2^18206104900 is an apocalyptic number.

18206104900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18206104900 is the 134930-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18206104900

18206104900 is an abundant number, since it is smaller than the sum of its proper divisors (21995295353).

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

18206104900 is a wasteful number, since it uses less digits than its factorization.

18206104900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 18206104900 in words is "eighteen billion, two hundred six million, one hundred four thousand, nine hundred".