21244202 has 16 divisors (see below), whose sum is σ = 37107072. Its totient is φ = 8932560.

The previous prime is 21244199. The next prime is 21244213. The reversal of 21244202 is 20244212.

It is a happy number.

It is a super-2 number, since 2×21244202² = 902632237233608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13574 + ... + 15057.

It is an arithmetic number, because the mean of its divisors is an integer number (2319192).

Almost surely, 2^21244202 is an apocalyptic number.

21244202 is a deficient number, since it is larger than the sum of its proper divisors (15862870).

21244202 is a wasteful number, since it uses less digits than its factorization.

21244202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28693.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 21244202 is about 4609.1433043463. The cubic root of 21244202 is about 276.9577192219.

Adding to 21244202 its reverse (20244212), we get a palindrome (41488414).

The spelling of 21244202 in words is "twenty-one million, two hundred forty-four thousand, two hundred two".