21034627 has 12 divisors (see below), whose sum is σ = 23292360. Its totient is φ = 18928448.

The previous prime is 21034613. The next prime is 21034667. The reversal of 21034627 is 72643012.

It is not a de Polignac number, because 21034627 - 2¹¹ = 21032579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034667) 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 11 ways as a sum of consecutive naturals, for example, 7824 + ... + 10162.

It is an arithmetic number, because the mean of its divisors is an integer number (1941030).

Almost surely, 2^21034627 is an apocalyptic number.

21034627 is a deficient number, since it is larger than the sum of its proper divisors (2257733).

21034627 is a wasteful number, since it uses less digits than its factorization.

21034627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21034627 is about 4586.3522542430. The cubic root of 21034627 is about 276.0439744748.

Adding to 21034627 its reverse (72643012), we get a palindrome (93677639).

The spelling of 21034627 in words is "twenty-one million, thirty-four thousand, six hundred twenty-seven".