20005002 has 16 divisors (see below), whose sum is σ = 44455680. Its totient is φ = 6668316.

The previous prime is 20004997. The next prime is 20005003. The reversal of 20005002 is 20050002.

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

It is not an unprimeable number, because it can be changed into a prime (20005003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185178 + ... + 185285.

It is an arithmetic number, because the mean of its divisors is an integer number (2778480).

Almost surely, 2^20005002 is an apocalyptic number.

20005002 is an abundant number, since it is smaller than the sum of its proper divisors (24450678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20005002 is a wasteful number, since it uses less digits than its factorization.

20005002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370474 (or 370468 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 20005002 is about 4472.6951606386. The cubic root of 20005002 is about 271.4643889681.

Adding to 20005002 its reverse (20050002), we get a palindrome (40055004).

The spelling of 20005002 in words is "twenty million, five thousand, two".