21014210 has 32 divisors (see below), whose sum is σ = 45774720. Its totient is φ = 6780672.

The previous prime is 21014179. The next prime is 21014233. The reversal of 21014210 is 1241012.

It is a junction number, because it is equal to n+sod(n) for n = 21014191 and 21014200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7640 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (1430460).

Almost surely, 2^21014210 is an apocalyptic number.

21014210 is an abundant number, since it is smaller than the sum of its proper divisors (24760510).

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

21014210 is a wasteful number, since it uses less digits than its factorization.

21014210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17690.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21014210 is about 4584.1258708722. The cubic root of 21014210 is about 275.9546326748.

Adding to 21014210 its reverse (1241012), we get a palindrome (22255222).

The spelling of 21014210 in words is "twenty-one million, fourteen thousand, two hundred ten".