27918820836 has 36 divisors (see below), whose sum is σ = 70677498892. Its totient is φ = 9292437504.

The previous prime is 27918820819. The next prime is 27918820847. The reversal of 27918820836 is 63802881972.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6106484736 + 21812336100 = 78144^2 + 147690^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551941 + ... + 600396.

Almost surely, 2^27918820836 is an apocalyptic number.

It is an amenable number.

27918820836 is an abundant number, since it is smaller than the sum of its proper divisors (42758678056).

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

27918820836 is a wasteful number, since it uses less digits than its factorization.

27918820836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153020 (or 1153015 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 27918820836 in words is "twenty-seven billion, nine hundred eighteen million, eight hundred twenty thousand, eight hundred thirty-six".