21334028347 has 2 divisors, whose sum is σ = 21334028348. Its totient is φ = 21334028346.

The previous prime is 21334028341. The next prime is 21334028369. The reversal of 21334028347 is 74382043312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21334028347 - 2¹¹ = 21334026299 is a prime.

It is not a weakly prime, because it can be changed into another prime (21334028341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667014173 + 10667014174.

It is an arithmetic number, because the mean of its divisors is an integer number (10667014174).

Almost surely, 2^21334028347 is an apocalyptic number.

21334028347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334028347 is an equidigital number, since it uses as much as digits as its factorization.

21334028347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 21334028347 in words is "twenty-one billion, three hundred thirty-four million, twenty-eight thousand, three hundred forty-seven".