21468425 has 36 divisors (see below), whose sum is σ = 30081408. Its totient is φ = 15180000.

The previous prime is 21468413. The next prime is 21468431. The reversal of 21468425 is 52486412.

It is not a de Polignac number, because 21468425 - 2⁸ = 21468169 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21468391 and 21468400.

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 35 ways as a sum of consecutive naturals, for example, 142100 + ... + 142250.

Almost surely, 2^21468425 is an apocalyptic number.

21468425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21468425 is a deficient number, since it is larger than the sum of its proper divisors (8612983).

21468425 is a wasteful number, since it uses less digits than its factorization.

21468425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 214 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 21468425 is about 4633.4031769316. The cubic root of 21468425 is about 277.9286991722.

The spelling of 21468425 in words is "twenty-one million, four hundred sixty-eight thousand, four hundred twenty-five".