21463245 has 32 divisors (see below), whose sum is σ = 38419200. Its totient is φ = 11368512.

The previous prime is 21463223. The next prime is 21463271. The reversal of 21463245 is 54236412.

21463245 is a `hidden beast` number, since 21 + 4 + 632 + 4 + 5 = 666.

It is not a de Polignac number, because 21463245 - 2⁶ = 21463181 is a prime.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 22896 + ... + 23814.

It is an arithmetic number, because the mean of its divisors is an integer number (1200600).

Almost surely, 2^21463245 is an apocalyptic number.

It is an amenable number.

21463245 is a deficient number, since it is larger than the sum of its proper divisors (16955955).

21463245 is a wasteful number, since it uses less digits than its factorization.

21463245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1100 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 21463245 is about 4632.8441588294. The cubic root of 21463245 is about 277.9063440706.

Adding to 21463245 its reverse (54236412), we get a palindrome (75699657).

The spelling of 21463245 in words is "twenty-one million, four hundred sixty-three thousand, two hundred forty-five".