21633141 has 8 divisors (see below), whose sum is σ = 29168640. Its totient is φ = 14259872.

The previous prime is 21633127. The next prime is 21633149. The reversal of 21633141 is 14133612.

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 21633141 - 2⁹ = 21632629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21633149) by changing a digit.

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, 40245 + ... + 40778.

It is an arithmetic number, because the mean of its divisors is an integer number (3646080).

Almost surely, 2^21633141 is an apocalyptic number.

It is an amenable number.

21633141 is a deficient number, since it is larger than the sum of its proper divisors (7535499).

21633141 is an equidigital number, since it uses as much as digits as its factorization.

21633141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81115.

The product of its digits is 432, while the sum is 21.

The square root of 21633141 is about 4651.1440528111. The cubic root of 21633141 is about 278.6376895446.

Adding to 21633141 its reverse (14133612), we get a palindrome (35766753).

The spelling of 21633141 in words is "twenty-one million, six hundred thirty-three thousand, one hundred forty-one".