21067384259 has 2 divisors, whose sum is σ = 21067384260. Its totient is φ = 21067384258.

The previous prime is 21067384241. The next prime is 21067384307. The reversal of 21067384259 is 95248376012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21067384259 - 2⁸ = 21067384003 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21067384159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10533692129 + 10533692130.

It is an arithmetic number, because the mean of its divisors is an integer number (10533692130).

It is a 1-persistent number, because it is pandigital, but 2⋅21067384259 = 42134768518 is not.

Almost surely, 2^21067384259 is an apocalyptic number.

21067384259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21067384259 is an equidigital number, since it uses as much as digits as its factorization.

21067384259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 21067384259 in words is "twenty-one billion, sixty-seven million, three hundred eighty-four thousand, two hundred fifty-nine".