20612269 has 2 divisors, whose sum is σ = 20612270. Its totient is φ = 20612268.

The previous prime is 20612239. The next prime is 20612341. The reversal of 20612269 is 96221602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11309769 + 9302500 = 3363^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 20612269 - 2⁵ = 20612237 is a prime.

It is a super-2 number, since 2×20612269² = 849731266656722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20612239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306134 + 10306135.

It is an arithmetic number, because the mean of its divisors is an integer number (10306135).

Almost surely, 2^20612269 is an apocalyptic number.

It is an amenable number.

20612269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612269 is an equidigital number, since it uses as much as digits as its factorization.

20612269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20612269 is about 4540.0736778163. The cubic root of 20612269 is about 274.1838900909.

The spelling of 20612269 in words is "twenty million, six hundred twelve thousand, two hundred sixty-nine".