20650519 has 2 divisors, whose sum is σ = 20650520. Its totient is φ = 20650518.

The previous prime is 20650507. The next prime is 20650541. The reversal of 20650519 is 91505602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20650519 - 2¹⁹ = 20126231 is a prime.

It is a super-2 number, since 2×20650519² = 852887869938722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20650559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325259 + 10325260.

It is an arithmetic number, because the mean of its divisors is an integer number (10325260).

Almost surely, 2^20650519 is an apocalyptic number.

20650519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650519 is an equidigital number, since it uses as much as digits as its factorization.

20650519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 20650519 is about 4544.2842120624. The cubic root of 20650519 is about 274.3533854736.

The spelling of 20650519 in words is "twenty million, six hundred fifty thousand, five hundred nineteen".