21463486 has 16 divisors (see below), whose sum is σ = 37188720. Its totient is φ = 9182080.

The previous prime is 21463447. The next prime is 21463489. The reversal of 21463486 is 68436412.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28321 + ... + 29068.

It is an arithmetic number, because the mean of its divisors is an integer number (2324295).

Almost surely, 2^21463486 is an apocalyptic number.

21463486 is a deficient number, since it is larger than the sum of its proper divisors (15725234).

21463486 is a wasteful number, since it uses less digits than its factorization.

21463486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57419.

The product of its digits is 27648, while the sum is 34.

The square root of 21463486 is about 4632.8701686967. The cubic root of 21463486 is about 277.9073842236.

Adding to 21463486 its reverse (68436412), we get a palindrome (89899898).

The spelling of 21463486 in words is "twenty-one million, four hundred sixty-three thousand, four hundred eighty-six".