21334051 has 4 divisors (see below), whose sum is σ = 21489912. Its totient is φ = 21178192.

The previous prime is 21334039. The next prime is 21334067. The reversal of 21334051 is 15043312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21334051 - 2⁹ = 21333539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334451) 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, 77725 + ... + 77998.

It is an arithmetic number, because the mean of its divisors is an integer number (5372478).

Almost surely, 2^21334051 is an apocalyptic number.

21334051 is a deficient number, since it is larger than the sum of its proper divisors (155861).

21334051 is a wasteful number, since it uses less digits than its factorization.

21334051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155860.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21334051 is about 4618.8798425592. The cubic root of 21334051 is about 277.3476197196.

Adding to 21334051 its reverse (15043312), we get a palindrome (36377363).

The spelling of 21334051 in words is "twenty-one million, three hundred thirty-four thousand, fifty-one".