27812020247 has 24 divisors (see below), whose sum is σ = 32979341808. Its totient is φ = 23347301120.

The previous prime is 27812020211. The next prime is 27812020277. The reversal of 27812020247 is 74202021872.

It is not a de Polignac number, because 27812020247 - 2¹⁶ = 27811954711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27812020277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18533 + ... + 236574.

It is an arithmetic number, because the mean of its divisors is an integer number (1374139242).

Almost surely, 2^27812020247 is an apocalyptic number.

27812020247 is a deficient number, since it is larger than the sum of its proper divisors (5167321561).

27812020247 is a wasteful number, since it uses less digits than its factorization.

27812020247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255199 (or 255188 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The spelling of 27812020247 in words is "twenty-seven billion, eight hundred twelve million, twenty thousand, two hundred forty-seven".