21050214 has 16 divisors (see below), whose sum is σ = 44316480. Its totient is φ = 6647400.

The previous prime is 21050203. The next prime is 21050231. The reversal of 21050214 is 41205012.

It is a super-2 number, since 2×21050214² = 886223018891592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21050193 and 21050202.

It is a congruent number.

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, 92212 + ... + 92439.

It is an arithmetic number, because the mean of its divisors is an integer number (2769780).

Almost surely, 2^21050214 is an apocalyptic number.

21050214 is an abundant number, since it is smaller than the sum of its proper divisors (23266266).

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

21050214 is a wasteful number, since it uses less digits than its factorization.

21050214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184675.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21050214 is about 4588.0512202895. The cubic root of 21050214 is about 276.1121419949.

Adding to 21050214 its reverse (41205012), we get a palindrome (62255226).

The spelling of 21050214 in words is "twenty-one million, fifty thousand, two hundred fourteen".