21819083 has 24 divisors (see below), whose sum is σ = 26255376. Its totient is φ = 18120960.

The previous prime is 21819073. The next prime is 21819097. The reversal of 21819083 is 38091812.

It is not a de Polignac number, because 21819083 - 2¹⁰ = 21818059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21819073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224891 + ... + 224987.

It is an arithmetic number, because the mean of its divisors is an integer number (1093974).

Almost surely, 2^21819083 is an apocalyptic number.

21819083 is a deficient number, since it is larger than the sum of its proper divisors (4436293).

21819083 is an equidigital number, since it uses as much as digits as its factorization.

21819083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 21819083 is about 4671.0901297235. The cubic root of 21819083 is about 279.4337322614.

The spelling of 21819083 in words is "twenty-one million, eight hundred nineteen thousand, eighty-three".