27143087421 has 4 divisors (see below), whose sum is σ = 36190783232. Its totient is φ = 18095391612.

The previous prime is 27143087351. The next prime is 27143087441. The reversal of 27143087421 is 12478034172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27143087421 - 2⁹ = 27143086909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27143087421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27143087441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4523847901 + ... + 4523847906.

It is an arithmetic number, because the mean of its divisors is an integer number (9047695808).

Almost surely, 2^27143087421 is an apocalyptic number.

It is an amenable number.

27143087421 is a deficient number, since it is larger than the sum of its proper divisors (9047695811).

27143087421 is an equidigital number, since it uses as much as digits as its factorization.

27143087421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9047695810.

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 27143087421 in words is "twenty-seven billion, one hundred forty-three million, eighty-seven thousand, four hundred twenty-one".