21234627 has 6 divisors (see below), whose sum is σ = 30672252. Its totient is φ = 14156412.

The previous prime is 21234623. The next prime is 21234667. The reversal of 21234627 is 72643212.

21234627 is a `hidden beast` number, since 2 + 1 + 2 + 34 + 627 = 666.

It is not a de Polignac number, because 21234627 - 2² = 21234623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21234627.

It is not an unprimeable number, because it can be changed into a prime (21234623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179693 + ... + 1179710.

It is an arithmetic number, because the mean of its divisors is an integer number (5112042).

Almost surely, 2^21234627 is an apocalyptic number.

21234627 is a deficient number, since it is larger than the sum of its proper divisors (9437625).

21234627 is a wasteful number, since it uses less digits than its factorization.

21234627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359409 (or 2359406 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 21234627 is about 4608.1044910028. The cubic root of 21234627 is about 276.9161036528.

Adding to 21234627 its reverse (72643212), we get a palindrome (93877839).

The spelling of 21234627 in words is "twenty-one million, two hundred thirty-four thousand, six hundred twenty-seven".