21244462 has 4 divisors (see below), whose sum is σ = 31866696. Its totient is φ = 10622230.

The previous prime is 21244459. The next prime is 21244463. The reversal of 21244462 is 26444212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5311114 + ... + 5311117.

It is an arithmetic number, because the mean of its divisors is an integer number (7966674).

Almost surely, 2^21244462 is an apocalyptic number.

21244462 is a deficient number, since it is larger than the sum of its proper divisors (10622234).

21244462 is a wasteful number, since it uses less digits than its factorization.

21244462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622233.

The product of its digits is 3072, while the sum is 25.

The square root of 21244462 is about 4609.1715090675. The cubic root of 21244462 is about 276.9588490786.

Adding to 21244462 its reverse (26444212), we get a palindrome (47688674).

The spelling of 21244462 in words is "twenty-one million, two hundred forty-four thousand, four hundred sixty-two".