21472462 has 16 divisors (see below), whose sum is σ = 37204272. Its totient is φ = 9185920.

The previous prime is 21472457. The next prime is 21472463. The reversal of 21472462 is 26427412.

It is a happy number.

It is a super-2 number, since 2×21472462² = 922133248682888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21472462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472463) 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, 28333 + ... + 29080.

It is an arithmetic number, because the mean of its divisors is an integer number (2325267).

Almost surely, 2^21472462 is an apocalyptic number.

21472462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21472462 is a deficient number, since it is larger than the sum of its proper divisors (15731810).

21472462 is a wasteful number, since it uses less digits than its factorization.

21472462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57443.

The product of its digits is 5376, while the sum is 28.

The square root of 21472462 is about 4633.8387973688. The cubic root of 21472462 is about 277.9461189850.

Adding to 21472462 its reverse (26427412), we get a palindrome (47899874).

The spelling of 21472462 in words is "twenty-one million, four hundred seventy-two thousand, four hundred sixty-two".