20213097269 has 2 divisors, whose sum is σ = 20213097270. Its totient is φ = 20213097268.

The previous prime is 20213097263. The next prime is 20213097323. The reversal of 20213097269 is 96279031202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18373802500 + 1839294769 = 135550^2 + 42887^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213097269 - 2¹⁶ = 20213031733 is a prime.

It is a super-2 number, since 2×20213097269² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213097263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106548634 + 10106548635.

It is an arithmetic number, because the mean of its divisors is an integer number (10106548635).

Almost surely, 2^20213097269 is an apocalyptic number.

It is an amenable number.

20213097269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213097269 is an equidigital number, since it uses as much as digits as its factorization.

20213097269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 20213097269 in words is "twenty billion, two hundred thirteen million, ninety-seven thousand, two hundred sixty-nine".