21244602 has 16 divisors (see below), whose sum is σ = 43210080. Its totient is φ = 6961392.

The previous prime is 21244589. The next prime is 21244609. The reversal of 21244602 is 20644212.

It is a super-2 number, since 2×21244602² = 902666228276808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21244609) by changing a digit.

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, 29653 + ... + 30360.

It is an arithmetic number, because the mean of its divisors is an integer number (2700630).

Almost surely, 2^21244602 is an apocalyptic number.

21244602 is an abundant number, since it is smaller than the sum of its proper divisors (21965478).

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

21244602 is a wasteful number, since it uses less digits than its factorization.

21244602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60077.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 21244602 is about 4609.1866961537. The cubic root of 21244602 is about 276.9594574592.

Adding to 21244602 its reverse (20644212), we get a palindrome (41888814).

The spelling of 21244602 in words is "twenty-one million, two hundred forty-four thousand, six hundred two".