27821471492 has 12 divisors (see below), whose sum is σ = 48761237196. Its totient is φ = 13889689440.

The previous prime is 27821471473. The next prime is 27821471497. The reversal of 27821471492 is 29417412872.

It can be written as a sum of positive squares in 2 ways, for example, as 15229040836 + 12592430656 = 123406^2 + 112216^2 .

It is not an unprimeable number, because it can be changed into a prime (27821471497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5258603 + ... + 5263890.

It is an arithmetic number, because the mean of its divisors is an integer number (4063436433).

Almost surely, 2^27821471492 is an apocalyptic number.

It is an amenable number.

27821471492 is a deficient number, since it is larger than the sum of its proper divisors (20939765704).

27821471492 is a wasteful number, since it uses less digits than its factorization.

27821471492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10523158 (or 10523156 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The spelling of 27821471492 in words is "twenty-seven billion, eight hundred twenty-one million, four hundred seventy-one thousand, four hundred ninety-two".