20524533217 has 2 divisors, whose sum is σ = 20524533218. Its totient is φ = 20524533216.

The previous prime is 20524533203. The next prime is 20524533241. The reversal of 20524533217 is 71233542502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16629649936 + 3894883281 = 128956^2 + 62409^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524533217 - 2¹⁵ = 20524500449 is a prime.

It is not a weakly prime, because it can be changed into another prime (20524533277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262266608 + 10262266609.

It is an arithmetic number, because the mean of its divisors is an integer number (10262266609).

Almost surely, 2^20524533217 is an apocalyptic number.

It is an amenable number.

20524533217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524533217 is an equidigital number, since it uses as much as digits as its factorization.

20524533217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 20524533217 in words is "twenty billion, five hundred twenty-four million, five hundred thirty-three thousand, two hundred seventeen".