20559233 has 2 divisors, whose sum is σ = 20559234. Its totient is φ = 20559232.

The previous prime is 20559223. The next prime is 20559269. The reversal of 20559233 is 33295502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 237169 = 4508^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 20559233 - 2¹⁴ = 20542849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20559196 and 20559205.

It is not a weakly prime, because it can be changed into another prime (20559223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10279616 + 10279617.

It is an arithmetic number, because the mean of its divisors is an integer number (10279617).

Almost surely, 2^20559233 is an apocalyptic number.

It is an amenable number.

20559233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20559233 is an equidigital number, since it uses as much as digits as its factorization.

20559233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20559233 is about 4534.2290414138. The cubic root of 20559233 is about 273.9485269250.

The spelling of 20559233 in words is "twenty million, five hundred fifty-nine thousand, two hundred thirty-three".