20276569 has 2 divisors, whose sum is σ = 20276570. Its totient is φ = 20276568.

The previous prime is 20276567. The next prime is 20276579. The reversal of 20276569 is 96567202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 26569 = 4500^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 20276569 - 2¹ = 20276567 is a prime.

It is a super-2 number, since 2×20276569² = 822278500823522, which contains 22 as substring.

Together with 20276567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20276561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138284 + 10138285.

It is an arithmetic number, because the mean of its divisors is an integer number (10138285).

Almost surely, 2^20276569 is an apocalyptic number.

It is an amenable number.

20276569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276569 is an equidigital number, since it uses as much as digits as its factorization.

20276569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20276569 is about 4502.9511434169. The cubic root of 20276569 is about 272.6872444250.

The spelling of 20276569 in words is "twenty million, two hundred seventy-six thousand, five hundred sixty-nine".