21463353 has 16 divisors (see below), whose sum is σ = 31982400. Its totient is φ = 14225760.

The previous prime is 21463339. The next prime is 21463363. The reversal of 21463353 is 35336412.

It is a happy number.

21463353 is a `hidden beast` number, since 21 + 4 + 633 + 5 + 3 = 666.

It is not a de Polignac number, because 21463353 - 2⁶ = 21463289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21463363) 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 15 ways as a sum of consecutive naturals, for example, 2613 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (1998900).

Almost surely, 2^21463353 is an apocalyptic number.

It is an amenable number.

21463353 is a deficient number, since it is larger than the sum of its proper divisors (10519047).

21463353 is a wasteful number, since it uses less digits than its factorization.

21463353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629 (or 4623 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 21463353 is about 4632.8558147216. The cubic root of 21463353 is about 277.9068101982.

Adding to 21463353 its reverse (35336412), we get a palindrome (56799765).

The spelling of 21463353 in words is "twenty-one million, four hundred sixty-three thousand, three hundred fifty-three".