21130010 has 16 divisors (see below), whose sum is σ = 41491872. Its totient is φ = 7683600.

The previous prime is 21130001. The next prime is 21130027. The reversal of 21130010 is 1003112.

It is a self number, because there is not a number n which added to its sum of digits gives 21130010.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 95936 + ... + 96155.

It is an arithmetic number, because the mean of its divisors is an integer number (2593242).

Almost surely, 2^21130010 is an apocalyptic number.

21130010 is a deficient number, since it is larger than the sum of its proper divisors (20361862).

21130010 is a wasteful number, since it uses less digits than its factorization.

21130010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192109.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 21130010 is about 4596.7390615522. The cubic root of 21130010 is about 276.4605923387.

Adding to 21130010 its reverse (1003112), we get a palindrome (22133122).

It can be divided in two parts, 21 and 130010, that added together give a palindrome (130031).

The spelling of 21130010 in words is "twenty-one million, one hundred thirty thousand, ten".