20048513 has 2 divisors, whose sum is σ = 20048514. Its totient is φ = 20048512.

The previous prime is 20048503. The next prime is 20048519. The reversal of 20048513 is 31584002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 49729 = 4472^2 + 223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20048513 is a prime.

It is a super-2 number, since 2×20048513² = 803885747022338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20048519) 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, 10024256 + 10024257.

It is an arithmetic number, because the mean of its divisors is an integer number (10024257).

Almost surely, 2^20048513 is an apocalyptic number.

It is an amenable number.

20048513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20048513 is an equidigital number, since it uses as much as digits as its factorization.

20048513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20048513 is about 4477.5565881405. The cubic root of 20048513 is about 271.6610586787.

The spelling of 20048513 in words is "twenty million, forty-eight thousand, five hundred thirteen".