20419519 has 2 divisors, whose sum is σ = 20419520. Its totient is φ = 20419518.

The previous prime is 20419501. The next prime is 20419541. The reversal of 20419519 is 91591402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20419519 - 2⁷ = 20419391 is a prime.

It is a super-2 number, since 2×20419519² = 833913512382722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20419549) 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, 10209759 + 10209760.

It is an arithmetic number, because the mean of its divisors is an integer number (10209760).

Almost surely, 2^20419519 is an apocalyptic number.

20419519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20419519 is an equidigital number, since it uses as much as digits as its factorization.

20419519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 20419519 is about 4518.7961892522. The cubic root of 20419519 is about 273.3265602459.

The spelling of 20419519 in words is "twenty million, four hundred nineteen thousand, five hundred nineteen".