21733145067461 has 2 divisors, whose sum is σ = 21733145067462. Its totient is φ = 21733145067460.

The previous prime is 21733145067451. The next prime is 21733145067493. The reversal of 21733145067461 is 16476054133712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20904509901025 + 828635166436 = 4572145^2 + 910294^2 .

It is a cyclic number.

It is not a de Polignac number, because 21733145067461 - 2²⁶ = 21733077958597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21733145067451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10866572533730 + 10866572533731.

It is an arithmetic number, because the mean of its divisors is an integer number (10866572533731).

Almost surely, 2^{21733145067461} is an apocalyptic number.

It is an amenable number.

21733145067461 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733145067461 is an equidigital number, since it uses as much as digits as its factorization.

21733145067461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 21733145067461 in words is "twenty-one trillion, seven hundred thirty-three billion, one hundred forty-five million, sixty-seven thousand, four hundred sixty-one".