18011250436 has 9 divisors (see below), whose sum is σ = 31520157991. Its totient is φ = 9005491012.

The previous prime is 18011250419. The next prime is 18011250437. The reversal of 18011250436 is 63405211081.

The square root of 18011250436 is 134206.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18011250398 and 18011250407.

It is not an unprimeable number, because it can be changed into a prime (18011250437) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 234861 + ... + 301963.

Almost surely, 2^18011250436 is an apocalyptic number.

18011250436 is the 134206-th square number.

It is an amenable number.

18011250436 is a deficient number, since it is larger than the sum of its proper divisors (13508907555).

18011250436 is an frugal number, since it uses more digits than its factorization.

18011250436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134210 (or 67105 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 18011250436 in words is "eighteen billion, eleven million, two hundred fifty thousand, four hundred thirty-six".