21462316 has 24 divisors (see below), whose sum is σ = 38342304. Its totient is φ = 10510080.

The previous prime is 21462307. The next prime is 21462319. The reversal of 21462316 is 61326412.

It is not an unprimeable number, because it can be changed into a prime (21462319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46326 + ... + 46786.

It is an arithmetic number, because the mean of its divisors is an integer number (1597596).

Almost surely, 2^21462316 is an apocalyptic number.

It is an amenable number.

21462316 is a deficient number, since it is larger than the sum of its proper divisors (16879988).

21462316 is a wasteful number, since it uses less digits than its factorization.

21462316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 21462316 is about 4632.7438953605. The cubic root of 21462316 is about 277.9023344451.

Adding to 21462316 its reverse (61326412), we get a palindrome (82788728).

The spelling of 21462316 in words is "twenty-one million, four hundred sixty-two thousand, three hundred sixteen".