21932841 has 24 divisors (see below), whose sum is σ = 35122944. Its totient is φ = 12126240.

The previous prime is 21932819. The next prime is 21932851. The reversal of 21932841 is 14823912.

It is not a de Polignac number, because 21932841 - 2⁵ = 21932809 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21932799 and 21932808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21932851) 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 23 ways as a sum of consecutive naturals, for example, 2151 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (1463456).

Almost surely, 2^21932841 is an apocalyptic number.

21932841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21932841 is a deficient number, since it is larger than the sum of its proper divisors (13190103).

21932841 is a wasteful number, since it uses less digits than its factorization.

21932841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861 (or 4854 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 21932841 is about 4683.2511143435. The cubic root of 21932841 is about 279.9185179571.

The spelling of 21932841 in words is "twenty-one million, nine hundred thirty-two thousand, eight hundred forty-one".