20087019 has 6 divisors (see below), whose sum is σ = 29014596. Its totient is φ = 13391340.

The previous prime is 20086991. The next prime is 20087021. The reversal of 20087019 is 91078002.

It is not a de Polignac number, because 20087019 - 2¹¹ = 20084971 is a prime.

It is a super-3 number, since 3×20087019³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20086983 and 20087001.

It is not an unprimeable number, because it can be changed into a prime (20087059) 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 in 5 ways as a sum of consecutive naturals, for example, 1115937 + ... + 1115954.

It is an arithmetic number, because the mean of its divisors is an integer number (4835766).

Almost surely, 2^20087019 is an apocalyptic number.

20087019 is a deficient number, since it is larger than the sum of its proper divisors (8927577).

20087019 is a wasteful number, since it uses less digits than its factorization.

20087019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231897 (or 2231894 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20087019 is about 4481.8544153062. The cubic root of 20087019 is about 271.8348685910.

The spelling of 20087019 in words is "twenty million, eighty-seven thousand, nineteen".