20213223269 has 2 divisors, whose sum is σ = 20213223270. Its totient is φ = 20213223268.

The previous prime is 20213223259. The next prime is 20213223421. The reversal of 20213223269 is 96232231202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13856350369 + 6356872900 = 117713^2 + 79730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213223269 is a prime.

It is a super-2 number, since 2×20213223269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213223209) 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, 10106611634 + 10106611635.

It is an arithmetic number, because the mean of its divisors is an integer number (10106611635).

Almost surely, 2^20213223269 is an apocalyptic number.

It is an amenable number.

20213223269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213223269 is an equidigital number, since it uses as much as digits as its factorization.

20213223269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 20213223269 in words is "twenty billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred sixty-nine".