21152633 has 8 divisors (see below), whose sum is σ = 22100736. Its totient is φ = 20221200.

The previous prime is 21152591. The next prime is 21152657. The reversal of 21152633 is 33625112.

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 21152633 - 2⁶ = 21152569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21152599 and 21152608.

It is not an unprimeable number, because it can be changed into a prime (21152683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (2762592).

Almost surely, 2^21152633 is an apocalyptic number.

It is an amenable number.

21152633 is a deficient number, since it is larger than the sum of its proper divisors (948103).

21152633 is an equidigital number, since it uses as much as digits as its factorization.

21152633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8335.

The product of its digits is 1080, while the sum is 23.

The square root of 21152633 is about 4599.1991694207. The cubic root of 21152633 is about 276.5592220004.

Adding to 21152633 its reverse (33625112), we get a palindrome (54777745).

The spelling of 21152633 in words is "twenty-one million, one hundred fifty-two thousand, six hundred thirty-three".