21426352 has 10 divisors (see below), whose sum is σ = 41513588. Its totient is φ = 10713168.

The previous prime is 21426343. The next prime is 21426359. The reversal of 21426352 is 25362412.

It is not an unprimeable number, because it can be changed into a prime (21426359) by changing a digit.

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 as a sum of consecutive naturals, namely, 669558 + ... + 669589.

Almost surely, 2^21426352 is an apocalyptic number.

It is an amenable number.

21426352 is a deficient number, since it is larger than the sum of its proper divisors (20087236).

21426352 is a wasteful number, since it uses less digits than its factorization.

21426352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339155 (or 1339149 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 21426352 is about 4628.8607669706. The cubic root of 21426352 is about 277.7470224201.

Adding to 21426352 its reverse (25362412), we get a palindrome (46788764).

The spelling of 21426352 in words is "twenty-one million, four hundred twenty-six thousand, three hundred fifty-two".