20028519 has 16 divisors (see below), whose sum is σ = 33911040. Its totient is φ = 11444760.

The previous prime is 20028517. The next prime is 20028521. The reversal of 20028519 is 91582002.

It is an interprime number because it is at equal distance from previous prime (20028517) and next prime (20028521).

It is not a de Polignac number, because 20028519 - 2¹ = 20028517 is a prime.

It is a super-2 number, since 2×20028519² = 802283146666722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20028492 and 20028501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028517) 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 in 15 ways as a sum of consecutive naturals, for example, 52797 + ... + 53174.

It is an arithmetic number, because the mean of its divisors is an integer number (2119440).

Almost surely, 2^20028519 is an apocalyptic number.

20028519 is a deficient number, since it is larger than the sum of its proper divisors (13882521).

20028519 is a wasteful number, since it uses less digits than its factorization.

20028519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105987 (or 105981 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20028519 is about 4475.3233402739. The cubic root of 20028519 is about 271.5707211756.

The spelling of 20028519 in words is "twenty million, twenty-eight thousand, five hundred nineteen".