27218205426 has 16 divisors (see below), whose sum is σ = 55203121728. Its totient is φ = 8944950000.

The previous prime is 27218205373. The next prime is 27218205433. The reversal of 27218205426 is 62450281272.

It is a super-2 number, since 2×27218205426² (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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31945825 + ... + 31946676.

It is an arithmetic number, because the mean of its divisors is an integer number (3450195108).

Almost surely, 2^27218205426 is an apocalyptic number.

27218205426 is an abundant number, since it is smaller than the sum of its proper divisors (27984916302).

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

27218205426 is a wasteful number, since it uses less digits than its factorization.

27218205426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63892577.

The product of its (nonzero) digits is 107520, while the sum is 39.

Adding to 27218205426 its reverse (62450281272), we get a palindrome (89668486698).

The spelling of 27218205426 in words is "twenty-seven billion, two hundred eighteen million, two hundred five thousand, four hundred twenty-six".