21733541671 has 2 divisors, whose sum is σ = 21733541672. Its totient is φ = 21733541670.

The previous prime is 21733541663. The next prime is 21733541689. The reversal of 21733541671 is 17614533712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21733541671 - 2³ = 21733541663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21733542671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10866770835 + 10866770836.

It is an arithmetic number, because the mean of its divisors is an integer number (10866770836).

Almost surely, 2^21733541671 is an apocalyptic number.

21733541671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733541671 is an equidigital number, since it uses as much as digits as its factorization.

21733541671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The spelling of 21733541671 in words is "twenty-one billion, seven hundred thirty-three million, five hundred forty-one thousand, six hundred seventy-one".