21463371 has 12 divisors (see below), whose sum is σ = 31440240. Its totient is φ = 14106960.

The previous prime is 21463363. The next prime is 21463373. The reversal of 21463371 is 17336412.

21463371 is a `hidden beast` number, since 21 + 4 + 633 + 7 + 1 = 666.

It is not a de Polignac number, because 21463371 - 2³ = 21463363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21463373) 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 11 ways as a sum of consecutive naturals, for example, 16156 + ... + 17433.

It is an arithmetic number, because the mean of its divisors is an integer number (2620020).

Almost surely, 2^21463371 is an apocalyptic number.

21463371 is a deficient number, since it is larger than the sum of its proper divisors (9976869).

21463371 is a wasteful number, since it uses less digits than its factorization.

21463371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33666 (or 33663 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 21463371 is about 4632.8577573675. The cubic root of 21463371 is about 277.9068878860.

Adding to 21463371 its reverse (17336412), we get a palindrome (38799783).

The spelling of 21463371 in words is "twenty-one million, four hundred sixty-three thousand, three hundred seventy-one".