21440476741693 has 2 divisors, whose sum is σ = 21440476741694. Its totient is φ = 21440476741692.

The previous prime is 21440476741679. The next prime is 21440476741741. The reversal of 21440476741693 is 39614767404412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18869832099364 + 2570644642329 = 4343942^2 + 1603323^2 .

It is a cyclic number.

It is not a de Polignac number, because 21440476741693 - 2¹⁷ = 21440476610621 is a prime.

It is a super-2 number, since 2×21440476741693² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21440476741603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720238370846 + 10720238370847.

It is an arithmetic number, because the mean of its divisors is an integer number (10720238370847).

Almost surely, 2^{21440476741693} is an apocalyptic number.

It is an amenable number.

21440476741693 is a deficient number, since it is larger than the sum of its proper divisors (1).

21440476741693 is an equidigital number, since it uses as much as digits as its factorization.

21440476741693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 21440476741693 in words is "twenty-one trillion, four hundred forty billion, four hundred seventy-six million, seven hundred forty-one thousand, six hundred ninety-three".