21425350 has 36 divisors (see below), whose sum is σ = 42094404. Its totient is φ = 8112240.

The previous prime is 21425347. The next prime is 21425363. The reversal of 21425350 is 5352412.

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 17 ways as a sum of consecutive naturals, for example, 17457 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (1169289).

Almost surely, 2^21425350 is an apocalyptic number.

21425350 is a deficient number, since it is larger than the sum of its proper divisors (20669054).

21425350 is a wasteful number, since it uses less digits than its factorization.

21425350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 21425350 is about 4628.7525317303. The cubic root of 21425350 is about 277.7426927539.

Adding to 21425350 its reverse (5352412), we get a palindrome (26777762).

The spelling of 21425350 in words is "twenty-one million, four hundred twenty-five thousand, three hundred fifty".