20105002 has 16 divisors (see below), whose sum is σ = 32423040. Its totient is φ = 9319968.

The previous prime is 20104993. The next prime is 20105009. The reversal of 20105002 is 20050102.

It is a super-2 number, since 2×20105002² = 808422210840008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20105002.

It is not an unprimeable number, because it can be changed into a prime (20105009) 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, 3843 + ... + 7414.

It is an arithmetic number, because the mean of its divisors is an integer number (2026440).

Almost surely, 2^20105002 is an apocalyptic number.

20105002 is a deficient number, since it is larger than the sum of its proper divisors (12318038).

20105002 is a wasteful number, since it uses less digits than its factorization.

20105002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 20105002 is about 4483.8601673112. The cubic root of 20105002 is about 271.9159648847.

Adding to 20105002 its reverse (20050102), we get a palindrome (40155104).

The spelling of 20105002 in words is "twenty million, one hundred five thousand, two".