21414212 has 6 divisors (see below), whose sum is σ = 37474878. Its totient is φ = 10707104.

The previous prime is 21414193. The next prime is 21414221. The reversal of 21414212 is 21241412.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 6791236 = 3824^2 + 2606^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2676773 + ... + 2676780.

It is an arithmetic number, because the mean of its divisors is an integer number (6245813).

Almost surely, 2^21414212 is an apocalyptic number.

It is an amenable number.

21414212 is a deficient number, since it is larger than the sum of its proper divisors (16060666).

21414212 is a wasteful number, since it uses less digits than its factorization.

21414212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353557 (or 5353555 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 21414212 is about 4627.5492433901. The cubic root of 21414212 is about 277.6945560946.

Adding to 21414212 its reverse (21241412), we get a palindrome (42655624).

The spelling of 21414212 in words is "twenty-one million, four hundred fourteen thousand, two hundred twelve".