20213269 has 2 divisors, whose sum is σ = 20213270. Its totient is φ = 20213268.

The previous prime is 20213267. The next prime is 20213273. The reversal of 20213269 is 96231202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11303044 + 8910225 = 3362^2 + 2985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213269 - 2¹ = 20213267 is a prime.

It is a super-2 number, since 2×20213269² = 817152487332722, which contains 22 as substring.

Together with 20213267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106634 + 10106635.

It is an arithmetic number, because the mean of its divisors is an integer number (10106635).

Almost surely, 2^20213269 is an apocalyptic number.

It is an amenable number.

20213269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213269 is an equidigital number, since it uses as much as digits as its factorization.

20213269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20213269 is about 4495.9169253891. The cubic root of 20213269 is about 272.4031875600.

The spelling of 20213269 in words is "twenty million, two hundred thirteen thousand, two hundred sixty-nine".