21834803 has 2 divisors, whose sum is σ = 21834804. Its totient is φ = 21834802.

The previous prime is 21834793. The next prime is 21834821. The reversal of 21834803 is 30843812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21834803 - 2¹⁸ = 21572659 is a prime.

It is a Chen prime.

It is equal to p_1379432 and since 21834803 and 1379432 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (21834823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10917401 + 10917402.

It is an arithmetic number, because the mean of its divisors is an integer number (10917402).

Almost surely, 2^21834803 is an apocalyptic number.

21834803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21834803 is an equidigital number, since it uses as much as digits as its factorization.

21834803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21834803 is about 4672.7725174675. The cubic root of 21834803 is about 279.5008240477.

Subtracting 21834803 from its reverse (30843812), we obtain a palindrome (9009009).

The spelling of 21834803 in words is "twenty-one million, eight hundred thirty-four thousand, eight hundred three".