500010021 has 12 divisors (see below), whose sum is σ = 825413472. Its totient is φ = 285719976.

The previous prime is 500009969. The next prime is 500010029. The reversal of 500010021 is 120010005.

It is a happy number.

It is not a de Polignac number, because 500010021 - 2²³ = 491621413 is a prime.

It is a super-2 number, since 2×500010021² = 500020042200840882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 500009985 and 500010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500010029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3968271 + ... + 3968396.

It is an arithmetic number, because the mean of its divisors is an integer number (68784456).

Almost surely, 2^500010021 is an apocalyptic number.

It is an amenable number.

500010021 is a deficient number, since it is larger than the sum of its proper divisors (325403451).

500010021 is a wasteful number, since it uses less digits than its factorization.

500010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936680 (or 7936677 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 500010021 is about 22360.9038502472. The cubic root of 500010021 is about 793.7058283973.

Adding to 500010021 its reverse (120010005), we get a palindrome (620020026).

The spelling of 500010021 in words is "five hundred million, ten thousand, twenty-one".