18222543980 has 12 divisors (see below), whose sum is σ = 38267342400. Its totient is φ = 7289017584.

The previous prime is 18222543973. The next prime is 18222544003. The reversal of 18222543980 is 8934522281.

It is a super-2 number, since 2×18222543980² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455563580 + ... + 455563619.

It is an arithmetic number, because the mean of its divisors is an integer number (3188945200).

Almost surely, 2^18222543980 is an apocalyptic number.

18222543980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18222543980 is an abundant number, since it is smaller than the sum of its proper divisors (20044798420).

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

18222543980 is a wasteful number, since it uses less digits than its factorization.

18222543980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911127208 (or 911127206 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 18222543980 in words is "eighteen billion, two hundred twenty-two million, five hundred forty-three thousand, nine hundred eighty".