21834841 has 18 divisors (see below), whose sum is σ = 26112042. Its totient is φ = 18204480.

The previous prime is 21834833. The next prime is 21834859. The reversal of 21834841 is 14843812.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 1449616 = 4515^2 + 1204^2 .

It is not a de Polignac number, because 21834841 - 2³ = 21834833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21834821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 90481 + ... + 90721.

It is an arithmetic number, because the mean of its divisors is an integer number (1450669).

Almost surely, 2^21834841 is an apocalyptic number.

It is an amenable number.

21834841 is a deficient number, since it is larger than the sum of its proper divisors (4277201).

21834841 is an equidigital number, since it uses as much as digits as its factorization.

21834841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 291 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 21834841 is about 4672.7765835743. The cubic root of 21834841 is about 279.5009861898.

The spelling of 21834841 in words is "twenty-one million, eight hundred thirty-four thousand, eight hundred forty-one".