18222205440 has 80 divisors (see below), whose sum is σ = 58254137568. Its totient is φ = 4859252736.

The previous prime is 18222205433. The next prime is 18222205459. The reversal of 18222205440 is 4450222281.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18222205398 and 18222205407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178662 + ... + 1194021.

Almost surely, 2^18222205440 is an apocalyptic number.

18222205440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18222205440 is an abundant number, since it is smaller than the sum of its proper divisors (40031932128).

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

18222205440 is an equidigital number, since it uses as much as digits as its factorization.

18222205440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372709 (or 2372693 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The spelling of 18222205440 in words is "eighteen billion, two hundred twenty-two million, two hundred five thousand, four hundred forty".