21423462 has 16 divisors (see below), whose sum is σ = 43364160. Its totient is φ = 7054952.

The previous prime is 21423421. The next prime is 21423487. The reversal of 21423462 is 26432412.

It is a congruent number.

It is an unprimeable number.

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, 21012 + ... + 22007.

It is an arithmetic number, because the mean of its divisors is an integer number (2710260).

Almost surely, 2^21423462 is an apocalyptic number.

21423462 is an abundant number, since it is smaller than the sum of its proper divisors (21940698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423462 is a wasteful number, since it uses less digits than its factorization.

21423462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43107.

The product of its digits is 2304, while the sum is 24.

The square root of 21423462 is about 4628.5485845997. The cubic root of 21423462 is about 277.7345342935.

Adding to 21423462 its reverse (26432412), we get a palindrome (47855874).

The spelling of 21423462 in words is "twenty-one million, four hundred twenty-three thousand, four hundred sixty-two".