21242035 has 8 divisors (see below), whose sum is σ = 25528896. Its totient is φ = 16968000.

The previous prime is 21241991. The next prime is 21242047. The reversal of 21242035 is 53024212.

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

It is not a de Polignac number, because 21242035 - 2¹³ = 21233843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (3191112).

Almost surely, 2^21242035 is an apocalyptic number.

21242035 is a deficient number, since it is larger than the sum of its proper divisors (4286861).

21242035 is an equidigital number, since it uses as much as digits as its factorization.

21242035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21242035 is about 4608.9082221281. The cubic root of 21242035 is about 276.9483019420.

Adding to 21242035 its reverse (53024212), we get a palindrome (74266247).

The spelling of 21242035 in words is "twenty-one million, two hundred forty-two thousand, thirty-five".