20449330529 has 2 divisors, whose sum is σ = 20449330530. Its totient is φ = 20449330528.

The previous prime is 20449330487. The next prime is 20449330589. The reversal of 20449330529 is 92503394402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19899334225 + 549996304 = 141065^2 + 23452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20449330529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20449330589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224665264 + 10224665265.

It is an arithmetic number, because the mean of its divisors is an integer number (10224665265).

Almost surely, 2^20449330529 is an apocalyptic number.

It is an amenable number.

20449330529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20449330529 is an equidigital number, since it uses as much as digits as its factorization.

20449330529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 20449330529 in words is "twenty billion, four hundred forty-nine million, three hundred thirty thousand, five hundred twenty-nine".