27990820803 has 16 divisors (see below), whose sum is σ = 41660758656. Its totient is φ = 16569618240.

The previous prime is 27990820787. The next prime is 27990820849. The reversal of 27990820803 is 30802809972.

It is a happy number.

It is not a de Polignac number, because 27990820803 - 2⁴ = 27990820787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27990820883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9861450 + ... + 9864287.

It is an arithmetic number, because the mean of its divisors is an integer number (2603797416).

Almost surely, 2^27990820803 is an apocalyptic number.

27990820803 is a deficient number, since it is larger than the sum of its proper divisors (13669937853).

27990820803 is a wasteful number, since it uses less digits than its factorization.

27990820803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19725794.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 27990820803 in words is "twenty-seven billion, nine hundred ninety million, eight hundred twenty thousand, eight hundred three".