20476513 has 2 divisors, whose sum is σ = 20476514. Its totient is φ = 20476512.

The previous prime is 20476501. The next prime is 20476531. The reversal of 20476513 is 31567402.

Together with next prime (20476531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 154449 = 4508^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 20476513 - 2¹⁷ = 20345441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20476543) 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, 10238256 + 10238257.

It is an arithmetic number, because the mean of its divisors is an integer number (10238257).

Almost surely, 2^20476513 is an apocalyptic number.

It is an amenable number.

20476513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20476513 is an equidigital number, since it uses as much as digits as its factorization.

20476513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20476513 is about 4525.0981204831. The cubic root of 20476513 is about 273.5806227585.

The spelling of 20476513 in words is "twenty million, four hundred seventy-six thousand, five hundred thirteen".