18040281650 has 48 divisors (see below), whose sum is σ = 34031214720. Its totient is φ = 7114296000.

The previous prime is 18040281643. The next prime is 18040281659. The reversal of 18040281650 is 5618204081.

It is a super-2 number, since 2×18040281650² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18040281650.

It is not an unprimeable number, because it can be changed into a prime (18040281659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1199477 + ... + 1214423.

It is an arithmetic number, because the mean of its divisors is an integer number (708983640).

Almost surely, 2^18040281650 is an apocalyptic number.

18040281650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18040281650 is a deficient number, since it is larger than the sum of its proper divisors (15990933070).

18040281650 is a wasteful number, since it uses less digits than its factorization.

18040281650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15299 (or 15294 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The spelling of 18040281650 in words is "eighteen billion, forty million, two hundred eighty-one thousand, six hundred fifty".