21733961783 has 2 divisors, whose sum is σ = 21733961784. Its totient is φ = 21733961782.

The previous prime is 21733961773. The next prime is 21733961827. The reversal of 21733961783 is 38716933712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21733961783 - 2¹⁴ = 21733945399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21733961773) 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, 10866980891 + 10866980892.

It is an arithmetic number, because the mean of its divisors is an integer number (10866980892).

Almost surely, 2^21733961783 is an apocalyptic number.

21733961783 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733961783 is an equidigital number, since it uses as much as digits as its factorization.

21733961783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The spelling of 21733961783 in words is "twenty-one billion, seven hundred thirty-three million, nine hundred sixty-one thousand, seven hundred eighty-three".