21334027 has 16 divisors (see below), whose sum is σ = 25226208. Its totient is φ = 17786880.

The previous prime is 21334007. The next prime is 21334039. The reversal of 21334027 is 72043312.

21334027 = 484² + 485² + ... + 561².

It is not a de Polignac number, because 21334027 - 2²³ = 12945419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21333989 and 21334007.

It is not an unprimeable number, because it can be changed into a prime (21334007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27213 + ... + 27985.

It is an arithmetic number, because the mean of its divisors is an integer number (1576638).

Almost surely, 2^21334027 is an apocalyptic number.

21334027 is a deficient number, since it is larger than the sum of its proper divisors (3892181).

21334027 is a wasteful number, since it uses less digits than its factorization.

21334027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 21334027 is about 4618.8772445260. The cubic root of 21334027 is about 277.3475157177.

Adding to 21334027 its reverse (72043312), we get a palindrome (93377339).

The spelling of 21334027 in words is "twenty-one million, three hundred thirty-four thousand, twenty-seven".