20522449 has 2 divisors, whose sum is σ = 20522450. Its totient is φ = 20522448.

The previous prime is 20522429. The next prime is 20522477. The reversal of 20522449 is 94422502.

It is an a-pointer prime, because the next prime (20522477) can be obtained adding 20522449 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 986049 = 4420^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 20522449 - 2¹⁵ = 20489681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20522419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261224 + 10261225.

It is an arithmetic number, because the mean of its divisors is an integer number (10261225).

Almost surely, 2^20522449 is an apocalyptic number.

It is an amenable number.

20522449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20522449 is an equidigital number, since it uses as much as digits as its factorization.

20522449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20522449 is about 4530.1709680761. The cubic root of 20522449 is about 273.7850490628.

The spelling of 20522449 in words is "twenty million, five hundred twenty-two thousand, four hundred forty-nine".