20829269 has 2 divisors, whose sum is σ = 20829270. Its totient is φ = 20829268.

The previous prime is 20829253. The next prime is 20829313. The reversal of 20829269 is 96292802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 7360369 = 3670^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 20829269 - 2⁴ = 20829253 is a prime.

It is a super-2 number, since 2×20829269² = 867716894148722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20829209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414634 + 10414635.

It is an arithmetic number, because the mean of its divisors is an integer number (10414635).

Almost surely, 2^20829269 is an apocalyptic number.

It is an amenable number.

20829269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20829269 is an equidigital number, since it uses as much as digits as its factorization.

20829269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 20829269 is about 4563.9093987502. The cubic root of 20829269 is about 275.1427094002.

The spelling of 20829269 in words is "twenty million, eight hundred twenty-nine thousand, two hundred sixty-nine".