21425014 has 8 divisors (see below), whose sum is σ = 34609680. Its totient is φ = 9888456.

The previous prime is 21425009. The next prime is 21425021. The reversal of 21425014 is 41052412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21424982 and 21425000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411994 + ... + 412045.

It is an arithmetic number, because the mean of its divisors is an integer number (4326210).

Almost surely, 2^21425014 is an apocalyptic number.

21425014 is a deficient number, since it is larger than the sum of its proper divisors (13184666).

21425014 is a wasteful number, since it uses less digits than its factorization.

21425014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824054.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21425014 is about 4628.7162367119. The cubic root of 21425014 is about 277.7412408596.

Adding to 21425014 its reverse (41052412), we get a palindrome (62477426).

The spelling of 21425014 in words is "twenty-one million, four hundred twenty-five thousand, fourteen".