21933011169851 has 2 divisors, whose sum is σ = 21933011169852. Its totient is φ = 21933011169850.

The previous prime is 21933011169791. The next prime is 21933011169919. The reversal of 21933011169851 is 15896111033912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21933011169851 - 2¹⁸ = 21933010907707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21933011169851.

It is not a weakly prime, because it can be changed into another prime (21933011169151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10966505584925 + 10966505584926.

It is an arithmetic number, because the mean of its divisors is an integer number (10966505584926).

Almost surely, 2^{21933011169851} is an apocalyptic number.

21933011169851 is a deficient number, since it is larger than the sum of its proper divisors (1).

21933011169851 is an equidigital number, since it uses as much as digits as its factorization.

21933011169851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 21933011169851 in words is "twenty-one trillion, nine hundred thirty-three billion, eleven million, one hundred sixty-nine thousand, eight hundred fifty-one".