20554529 has 2 divisors, whose sum is σ = 20554530. Its totient is φ = 20554528.

The previous prime is 20554517. The next prime is 20554549. The reversal of 20554529 is 92545502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14077504 + 6477025 = 3752^2 + 2545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554529 is a prime.

It is a super-3 number, since 3×20554529³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20554495 and 20554504.

It is not a weakly prime, because it can be changed into another prime (20554549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277264 + 10277265.

It is an arithmetic number, because the mean of its divisors is an integer number (10277265).

Almost surely, 2^20554529 is an apocalyptic number.

It is an amenable number.

20554529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554529 is an equidigital number, since it uses as much as digits as its factorization.

20554529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 20554529 is about 4533.7102907001. The cubic root of 20554529 is about 273.9276319794.

The spelling of 20554529 in words is "twenty million, five hundred fifty-four thousand, five hundred twenty-nine".