20919669383 has 2 divisors, whose sum is σ = 20919669384. Its totient is φ = 20919669382.

The previous prime is 20919669373. The next prime is 20919669439. The reversal of 20919669383 is 38396691902.

It is an a-pointer prime, because the next prime (20919669439) can be obtained adding 20919669383 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20919669383 - 2²⁴ = 20902892167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20919669373) 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, 10459834691 + 10459834692.

It is an arithmetic number, because the mean of its divisors is an integer number (10459834692).

Almost surely, 2^20919669383 is an apocalyptic number.

20919669383 is a deficient number, since it is larger than the sum of its proper divisors (1).

20919669383 is an equidigital number, since it uses as much as digits as its factorization.

20919669383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 56.

The spelling of 20919669383 in words is "twenty billion, nine hundred nineteen million, six hundred sixty-nine thousand, three hundred eighty-three".