21848089 has 2 divisors, whose sum is σ = 21848090. Its totient is φ = 21848088.

The previous prime is 21848083. The next prime is 21848117. The reversal of 21848089 is 98084812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16064064 + 5784025 = 4008^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 21848089 - 2⁷ = 21847961 is a prime.

It is not a weakly prime, because it can be changed into another prime (21848083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10924044 + 10924045.

It is an arithmetic number, because the mean of its divisors is an integer number (10924045).

Almost surely, 2^21848089 is an apocalyptic number.

It is an amenable number.

21848089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21848089 is an equidigital number, since it uses as much as digits as its factorization.

21848089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 21848089 is about 4674.1939412053. The cubic root of 21848089 is about 279.5575025992.

The spelling of 21848089 in words is "twenty-one million, eight hundred forty-eight thousand, eighty-nine".