22428349218 has 54 divisors (see below), whose sum is σ = 53430721617. Its totient is φ = 6794351520.

The previous prime is 22428349183. The next prime is 22428349241. The reversal of 22428349218 is 81294382422.

22428349218 is a `hidden beast` number, since 2 + 2 + 428 + 3 + 4 + 9 + 218 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22337394849 + 90954369 = 149457^2 + 9537^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105897.

It is a super-2 number, since 2×22428349218² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6987598 + ... + 6990806.

Almost surely, 2^22428349218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22428349218

22428349218 is an abundant number, since it is smaller than the sum of its proper divisors (31002372399).

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

22428349218 is an equidigital number, since it uses as much as digits as its factorization.

22428349218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448 (or 3225 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 22428349218 in words is "twenty-two billion, four hundred twenty-eight million, three hundred forty-nine thousand, two hundred eighteen".