21334094591 has 2 divisors, whose sum is σ = 21334094592. Its totient is φ = 21334094590.

The previous prime is 21334094581. The next prime is 21334094609. The reversal of 21334094591 is 19549043312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21334094591 is a prime.

It is a super-3 number, since 3×21334094591³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334094581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667047295 + 10667047296.

It is an arithmetic number, because the mean of its divisors is an integer number (10667047296).

Almost surely, 2^21334094591 is an apocalyptic number.

21334094591 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334094591 is an equidigital number, since it uses as much as digits as its factorization.

21334094591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 21334094591 in words is "twenty-one billion, three hundred thirty-four million, ninety-four thousand, five hundred ninety-one".