21059422 has 8 divisors (see below), whose sum is σ = 32323896. Its totient is φ = 10284792.

The previous prime is 21059417. The next prime is 21059449. The reversal of 21059422 is 22495012.

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

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 3 ways as a sum of consecutive naturals, for example, 122353 + ... + 122524.

It is an arithmetic number, because the mean of its divisors is an integer number (4040487).

Almost surely, 2^21059422 is an apocalyptic number.

21059422 is a deficient number, since it is larger than the sum of its proper divisors (11264474).

21059422 is a wasteful number, since it uses less digits than its factorization.

21059422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244922.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21059422 is about 4589.0545867313. The cubic root of 21059422 is about 276.1523960588.

The spelling of 21059422 in words is "twenty-one million, fifty-nine thousand, four hundred twenty-two".