21632941 has 8 divisors (see below), whose sum is σ = 23666400. Its totient is φ = 19610640.

The previous prime is 21632921. The next prime is 21632983. The reversal of 21632941 is 14923612.

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 21632941 - 2⁷ = 21632813 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (2958300).

Almost surely, 2^21632941 is an apocalyptic number.

It is an amenable number.

21632941 is a deficient number, since it is larger than the sum of its proper divisors (2033459).

21632941 is a wasteful number, since it uses less digits than its factorization.

21632941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579.

The product of its digits is 2592, while the sum is 28.

The square root of 21632941 is about 4651.1225526748. The cubic root of 21632941 is about 278.6368308665.

The spelling of 21632941 in words is "twenty-one million, six hundred thirty-two thousand, nine hundred forty-one".