20544319 has 2 divisors, whose sum is σ = 20544320. Its totient is φ = 20544318.

The previous prime is 20544299. The next prime is 20544341. The reversal of 20544319 is 91344502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20544319 - 2¹⁷ = 20413247 is a prime.

It is a super-2 number, since 2×20544319² = 844138086347522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20544389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272159 + 10272160.

It is an arithmetic number, because the mean of its divisors is an integer number (10272160).

Almost surely, 2^20544319 is an apocalyptic number.

20544319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20544319 is an equidigital number, since it uses as much as digits as its factorization.

20544319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20544319 is about 4532.5841415246. The cubic root of 20544319 is about 273.8822686707.

The spelling of 20544319 in words is "twenty million, five hundred forty-four thousand, three hundred nineteen".