21801005346607 has 2 divisors, whose sum is σ = 21801005346608. Its totient is φ = 21801005346606.

The previous prime is 21801005346557. The next prime is 21801005346641. The reversal of 21801005346607 is 70664350010812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21801005346607 - 2¹⁵ = 21801005313839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21801005346697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10900502673303 + 10900502673304.

It is an arithmetic number, because the mean of its divisors is an integer number (10900502673304).

Almost surely, 2^{21801005346607} is an apocalyptic number.

21801005346607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21801005346607 is an equidigital number, since it uses as much as digits as its factorization.

21801005346607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 21801005346607 in words is "twenty-one trillion, eight hundred one billion, five million, three hundred forty-six thousand, six hundred seven".