27356421 has 4 divisors (see below), whose sum is σ = 36475232. Its totient is φ = 18237612.

The previous prime is 27356411. The next prime is 27356423. The reversal of 27356421 is 12465372.

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 27356421 - 2¹³ = 27348229 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 (27356423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4559401 + ... + 4559406.

It is an arithmetic number, because the mean of its divisors is an integer number (9118808).

Almost surely, 2^27356421 is an apocalyptic number.

It is an amenable number.

27356421 is a deficient number, since it is larger than the sum of its proper divisors (9118811).

27356421 is an equidigital number, since it uses as much as digits as its factorization.

27356421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9118810.

The product of its digits is 10080, while the sum is 30.

The square root of 27356421 is about 5230.3366048468. The cubic root of 27356421 is about 301.3143113215.

The spelling of 27356421 in words is "twenty-seven million, three hundred fifty-six thousand, four hundred twenty-one".