27820805852 has 18 divisors (see below), whose sum is σ = 56635212312. Its totient is φ = 11923202424.

The previous prime is 27820805843. The next prime is 27820805861. The reversal of 27820805852 is 25850802872.

It is an interprime number because it is at equal distance from previous prime (27820805843) and next prime (27820805861).

It is a junction number, because it is equal to n+sod(n) for n = 27820805797 and 27820805806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70971248 + ... + 70971639.

It is an arithmetic number, because the mean of its divisors is an integer number (3146400684).

Almost surely, 2^27820805852 is an apocalyptic number.

It is an amenable number.

27820805852 is an abundant number, since it is smaller than the sum of its proper divisors (28814406460).

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

27820805852 is a wasteful number, since it uses less digits than its factorization.

27820805852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141942905 (or 141942896 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 47.

The spelling of 27820805852 in words is "twenty-seven billion, eight hundred twenty million, eight hundred five thousand, eight hundred fifty-two".