27288642021 has 8 divisors (see below), whose sum is σ = 36509037600. Its totient is φ = 18130337232.

The previous prime is 27288641969. The next prime is 27288642089. The reversal of 27288642021 is 12024688272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27288642021 - 2⁹ = 27288641509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27288642221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15521671 + ... + 15523428.

It is an arithmetic number, because the mean of its divisors is an integer number (4563629700).

Almost surely, 2^27288642021 is an apocalyptic number.

It is an amenable number.

27288642021 is a deficient number, since it is larger than the sum of its proper divisors (9220395579).

27288642021 is a wasteful number, since it uses less digits than its factorization.

27288642021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31045395.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 27288642021 in words is "twenty-seven billion, two hundred eighty-eight million, six hundred forty-two thousand, twenty-one".