21533035 has 8 divisors (see below), whose sum is σ = 25872480. Its totient is φ = 17204544.

The previous prime is 21533011. The next prime is 21533047. The reversal of 21533035 is 53033512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21533035 - 2²¹ = 19435883 is a prime.

It is a super-2 number, since 2×21533035² = 927343192622450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21532997 and 21533015.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2506 + ... + 7024.

It is an arithmetic number, because the mean of its divisors is an integer number (3234060).

Almost surely, 2^21533035 is an apocalyptic number.

21533035 is a deficient number, since it is larger than the sum of its proper divisors (4339445).

21533035 is an equidigital number, since it uses as much as digits as its factorization.

21533035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 21533035 is about 4640.3701360991. The cubic root of 21533035 is about 278.2072320914.

Adding to 21533035 its reverse (53033512), we get a palindrome (74566547).

The spelling of 21533035 in words is "twenty-one million, five hundred thirty-three thousand, thirty-five".