21062612 has 6 divisors (see below), whose sum is σ = 36859578. Its totient is φ = 10531304.

The previous prime is 21062611. The next prime is 21062623. The reversal of 21062612 is 21626012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 9461776 = 3406^2 + 3076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062611) 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 as a sum of consecutive naturals, namely, 2632823 + ... + 2632830.

It is an arithmetic number, because the mean of its divisors is an integer number (6143263).

Almost surely, 2^21062612 is an apocalyptic number.

It is an amenable number.

21062612 is a deficient number, since it is larger than the sum of its proper divisors (15796966).

21062612 is a wasteful number, since it uses less digits than its factorization.

21062612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265657 (or 5265655 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 21062612 is about 4589.4021397128. The cubic root of 21062612 is about 276.1663388547.

Adding to 21062612 its reverse (21626012), we get a palindrome (42688624).

The spelling of 21062612 in words is "twenty-one million, sixty-two thousand, six hundred twelve".