18120250900 has 18 divisors (see below), whose sum is σ = 39320944670. Its totient is φ = 7248100320.

The previous prime is 18120250867. The next prime is 18120250901. The reversal of 18120250900 is 905202181.

It can be written as a sum of positive squares in 3 ways, for example, as 2400608016 + 15719642884 = 48996^2 + 125378^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120250901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90601155 + ... + 90601354.

Almost surely, 2^18120250900 is an apocalyptic number.

18120250900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18120250900 is an abundant number, since it is smaller than the sum of its proper divisors (21200693770).

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

18120250900 is a wasteful number, since it uses less digits than its factorization.

18120250900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181202523 (or 181202516 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 18120250900 in words is "eighteen billion, one hundred twenty million, two hundred fifty thousand, nine hundred".