21088027 has 4 divisors (see below), whose sum is σ = 21098056. Its totient is φ = 21078000.

The previous prime is 21088013. The next prime is 21088057. The reversal of 21088027 is 72088012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21088027 - 2¹¹ = 21085979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21087986 and 21088004.

It is not an unprimeable number, because it can be changed into a prime (21088057) 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, 513 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (5274514).

Almost surely, 2^21088027 is an apocalyptic number.

21088027 is a deficient number, since it is larger than the sum of its proper divisors (10029).

21088027 is an equidigital number, since it uses as much as digits as its factorization.

21088027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10028.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 21088027 is about 4592.1701841286. The cubic root of 21088027 is about 276.2773720344.

The spelling of 21088027 in words is "twenty-one million, eighty-eight thousand, twenty-seven".