21416463 has 12 divisors (see below), whose sum is σ = 31108168. Its totient is φ = 14197680.

The previous prime is 21416459. The next prime is 21416491. The reversal of 21416463 is 36461412.

21416463 is a `hidden beast` number, since 2 + 14 + 1 + 646 + 3 = 666.

It is not a de Polignac number, because 21416463 - 2² = 21416459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21417463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4945 + ... + 8202.

Almost surely, 2^21416463 is an apocalyptic number.

21416463 is a deficient number, since it is larger than the sum of its proper divisors (9691705).

21416463 is a wasteful number, since it uses less digits than its factorization.

21416463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13334 (or 13331 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 21416463 is about 4627.7924542918. The cubic root of 21416463 is about 277.7042859031.

Adding to 21416463 its reverse (36461412), we get a palindrome (57877875).

The spelling of 21416463 in words is "twenty-one million, four hundred sixteen thousand, four hundred sixty-three".